There are a total of 711 11-letter words containing 'um', and the number may vary in different dictionaries. You can specify the dictionary and order.
- accumulated 24
- accumulates 23
- accumulator 23
- acetabulums 23
- adumbrating 22
- adumbration 20
- adumbrative 23
- albuminoids 21
- albuminuria 21
- albuminuric 24
- altocumulus 22
- aluminising 20
- aluminizing 29
- animalculum 25
- antependium 21
- antheridium 19
- antidumping 23
- antirrhinum 19
- antitumoral 17
- archegonium 23
- argumentive 22
- aspergillum 22
- assumptions 19
- auditoriums 17
- avicularium 24
- bituminised 20
- bituminises 19
- bituminized 29
- bituminizes 28
- breadcrumbs 25
- bryophyllum 29
- buckjumpers 38
- buckjumping 41
- bumbershoot 23
- bumpinesses 22
- bumptiously 25
- cafetoriums 21
- californium 23
- callithumps 25
- calumniated 21
- calumniates 20
- calumniator 20
- candelabrum 24
- carborundum 24
- carpogonium 24
- catechumens 24
- cerebellums 23
- cinerariums 19
- circumcised 25
- circumciser 24
- circumcises 24
- circumfused 26
- circumfuses 25
- circumlunar 24
- circumpolar 25
- circumsolar 22
- circumspect 27
- circumvents 26
- cirrocumuli 23
- clostridium 20
- cockalorums 26
- colloquiums 30
- columbarium 26
- columnistic 23
- compendiums 26
- condominium 24
- consortiums 19
- consumables 23
- consumerism 22
- consumerist 19
- consumingly 25
- consummated 23
- consummates 22
- consummator 22
- consumption 23
- consumptive 26
- contagiosum 21
- contumacies 22
- contumelies 20
- copernicium 25
- corrigendum 22
- costumeries 18
- crematorium 21
- crumbliness 23
- cumberbunds 27
- cummerbunds 27
- cumulations 21
- cumulonimbi 27
- curriculums 24
- cypripedium 27
- definiendum 22
- dehumanised 20
- dehumanises 19
- dehumanized 29
- dehumanizes 28
- delphiniums 23
- denumerable 21
- denumerably 23
- desideratum 17
- desperandum 21
- detumescent 20
- detumescing 22
- dicoumarins 20
- dicoumarols 20
- disencumber 23
- dockominium 27
- documentary 22
- documenters 20
- documenting 23
- drumbeaters 19
- drumbeating 22
- dumbfounded 26
- dumbfounder 25
- dumbwaiters 22
- dumfounding 25
- dumpinesses 20
- duumvirates 21
- dysprosiums 21
- ecumenicism 25
- ecumenicist 22
- ecumenicity 24
- einsteinium 17
- encumbering 25
- encumbrance 26
- endocardium 21
- endometrium 20
- endothecium 22
- endothelium 20
- enumerating 19
- enumeration 17
- enumerative 20
- enumerators 16
- epidendrums 21
- epigastrium 20
- epineuriums 20
- epiphyllums 27
- episternums 19
- epitheliums 21
- equilibrium 29
- erythronium 20
- eubacterium 22
- exhumations 25
- explanandum 29
- explicandum 31
- florilegium 22
- formicarium 24
- frigidarium 21
- fumigations 21
- gadoliniums 20
- gametangium 23
- grumblingly 27
- gumminesses 21
- harrumphing 25
- helichrysum 25
- hesperidium 21
- hippeastrum 23
- honorariums 18
- hoodlumisms 22
- hormogonium 23
- humanbeings 24
- humannesses 19
- humanshield 22
- humidifiers 21
- humidifying 26
- humidistats 18
- humiliating 21
- humiliation 19
- humiliators 18
- hummingbird 27
- humoresques 27
- humorlessly 21
- hydroxonium 28
- illuminable 22
- illuminance 22
- illuminants 19
- illuminated 19
- illuminates 18
- illuminator 18
- illuminisms 21
- illuminists 18
- imposthumes 23
- incumbering 25
- incunabulum 26
- infrahumans 22
- inhumanness 20
- inhumations 19
- innumerable 21
- innumerably 23
- innumerates 17
- insectarium 19
- instruments 17
- integuments 19
- intermedium 20
- interregnum 19
- intumescent 20
- intumescing 22
- jumpinesses 28
- jumpstarted 28
- jumpstation 28
- kettledrums 21
- lactalbumin 24
- latifundium 22
- lawrenciums 23
- lebensraums 20
- leprosarium 19
- lumberjacks 35
- lumberyards 22
- lumbosacral 23
- luminescent 21
- luminescing 23
- lumpinesses 20
- lumpishness 22
- lumpsuckers 27
- lycopodiums 25
- magisterium 20
- manumission 20
- manumitters 19
- manumitting 22
- mediastinum 20
- mediumistic 22
- mediumships 24
- meerschaums 23
- megatherium 22
- memorandums 23
- mendelevium 25
- mesothelium 21
- millenniums 22
- minifundium 25
- misnumbered 23
- molybdenums 26
- monochasium 24
- moratoriums 18
- multicolumn 25
- multivolume 25
- mumpsimuses 25
- nasturtiums 17
- natatoriums 16
- neurohumors 19
- nippitatums 22
- nonaluminum 23
- nonargument 20
- nonconsumer 21
- nonluminous 20
- nonruminant 19
- numberplate 23
- numerations 17
- numerically 23
- numismatics 22
- numismatist 19
- oceanariums 19
- oecumenical 23
- opprobriums 24
- osmiridiums 19
- ostensorium 16
- outfumbling 26
- outhumoring 21
- outnumbered 21
- outtrumping 22
- overconsume 23
- overpumping 28
- overtrumped 23
- pancratiums 22
- pandemonium 24
- panjandrums 30
- parameciums 24
- paramoecium 24
- parfumeries 21
- pelargonium 22
- penicillium 24
- perfumeries 21
- pericardium 22
- pericranium 22
- perineurium 20
- perithecium 23
- peritoneums 19
- petrolatums 19
- phosphonium 26
- pigmentosum 24
- pittosporum 21
- planetarium 20
- plumpnesses 23
- pneumatique 29
- pneumococci 28
- pneumograph 26
- pneumonites 20
- pneumonitis 20
- podophyllum 28
- polemoniums 23
- positronium 19
- praesidiums 19
- precordiums 22
- prenumbered 23
- presumingly 24
- presumption 22
- presumptive 25
- procambiums 27
- proctodaeum 22
- promethiums 23
- prosceniums 22
- prothallium 22
- protohumans 21
- psalteriums 19
- pumpkinseed 27
- quadrennium 28
- quadriviums 30
- quadrumvirs 30
- rearguments 18
- recumbently 25
- referendums 20
- rehumanized 28
- rehumanizes 27
- renumbering 22
- resummoning 22
- resumptions 19
- retinaculum 21
- rheumaticky 26
- rheumatisms 20
- rheumatizes 26
- roentgenium 19
- rumbustious 20
- ruminations 17
- rumormonger 21
- sanatoriums 16
- sanitariums 16
- sanitoriums 16
- satellitium 17
- schlumpiest 24
- screendumps 23
- scriptorium 21
- scrumhalves 25
- scrummagers 23
- scrummaging 26
- scrumptious 22
- seaborgiums 20
- sempervivum 29
- septenniums 20
- sequestrums 25
- showjumpers 32
- showjumping 35
- simulacrums 23
- slumberland 22
- slumgullion 22
- slummocking 29
- smokejumper 34
- sporogonium 21
- staminodium 20
- stomodaeums 19
- stramoniums 19
- stumblebums 26
- stumblingly 25
- stylopodium 22
- subsumption 23
- subumbrella 24
- succedaneum 24
- sudatoriums 17
- sumatriptan 19
- summability 24
- summariness 19
- summarisers 18
- summarising 21
- summarizers 27
- summarizing 30
- summational 20
- summerhouse 21
- summersault 20
- summertimes 21
- summerwoods 22
- sumptuosity 21
- sumptuously 23
- technetiums 21
- tegumentary 20
- termitarium 18
- tetrazolium 25
- thaumatrope 20
- thaumaturge 20
- thaumaturgy 22
- thingumabob 26
- thingumajig 31
- thingummies 23
- thumbprints 24
- thumbscrews 26
- thumbsticks 27
- thumbsucker 28
- thumbtacked 28
- thumbwheels 26
- transhumant 19
- traumatised 16
- traumatises 15
- traumatisms 18
- traumatized 25
- traumatizes 24
- triumphally 24
- triumvirate 19
- tropaeolums 19
- trumpetfish 23
- trumpetlike 23
- tumbledryer 22
- tumblehomes 24
- tumblerfuls 24
- tumbleweeds 23
- tumefaction 22
- tumescences 22
- tumescently 22
- tumorigenic 21
- ultravacuum 25
- umbellifers 23
- umbilically 26
- umbilicated 23
- umbilicuses 23
- umbrellaing 23
- umbriferous 22
- uncrumpling 27
- unnilhexium 28
- unplumbable 28
- unpresuming 23
- wampumpeags 29
- wavenumbers 26
- acuminating 16
- barotraumas 15
- bumfuzzling 37
- columbaries 17
- conalbumins 17
- despumating 17
- hegumenoses 17
- humidnesses 17
- humpinesses 18
- jumpmasters 24
- longjumping 24
- meitneriums 15
- museumgoers 16
- plumbnesses 17
- plumosities 15
- proctodeums 18
- subminimums 19
- suboptimums 19
- substratums 15
- superhumans 18
- superjumbos 24
- tumblersful 18
- tumidnesses 14
- yumminesses 18
- accumulable 19
- acroteriums 15
- acumination 15
- albumblatts 17
- albumenised 16
- albumenises 15
- albumenized 25
- albumenizes 24
- albuminates 15
- albuminised 16
- albuminises 15
- albuminized 25
- albuminizes 24
- aluminosity 16
- ammoniacums 19
- anacardiums 16
- androeciums 16
- apodyterium 19
- argumentums 16
- aspersorium 15
- atracuriums 15
- autojumbles 22
- beaumontage 16
- benumbingly 21
- benumbments 19
- bituminated 16
- bituminates 15
- bressummers 17
- bumbailiffs 23
- bumfreezers 27
- bumpologies 18
- bumpsadaisy 21
- bumsuckings 22
- calumniable 17
- capillitium 17
- cassiopeium 17
- cassumunars 15
- circumduced 21
- circumduces 20
- circumducts 20
- circumflect 22
- circummured 20
- circummures 19
- circumposed 20
- circumposes 19
- circumvolve 23
- clinandrium 16
- coenosteums 15
- columnarity 18
- columniated 16
- compluviums 22
- connumerate 15
- contumacity 20
- corniculums 17
- crumbcloths 22
- cumberments 19
- cumulocirri 17
- custumaries 15
- decumbences 20
- decumbently 21
- decumbiture 18
- dendrobiums 17
- deplumation 16
- desideriums 15
- despumation 16
- diascordium 17
- digitoriums 15
- dinotherium 17
- discumbered 19
- dishumoured 18
- disinhuming 18
- dorsolumbar 16
- drumbledors 17
- dumbledores 17
- dumfounders 18
- dummelheads 20
- dumminesses 16
- dumpishness 19
- embothriums 20
- emolumental 15
- emplastrums 17
- empyreumata 20
- endocranium 16
- endoneurium 14
- eponychiums 23
- eriophorums 18
- eupatoriums 15
- euphorbiums 20
- excrementum 24
- fumatoriums 18
- gallumphing 20
- glumiferous 17
- gnaphaliums 19
- gummiferous 19
- gummosities 16
- gynostemium 19
- horologiums 17
- humbuggable 22
- humdrumness 19
- humdudgeons 19
- humectating 19
- humectation 18
- humgruffian 23
- humgruffins 23
- humiliative 19
- humiliatory 19
- humoralisms 18
- humoralists 16
- hydrargyrum 24
- imposthumed 21
- impostumate 17
- incumbently 20
- incumbrance 19
- indumentums 16
- intervallum 16
- intrapartum 15
- inumbrating 16
- ipratropium 17
- iridosmiums 16
- itacolumite 15
- jumhouriyas 26
- kummerbunds 22
- latrocinium 15
- lenociniums 15
- lubritorium 15
- lumbaginous 16
- lumberingly 19
- lumbricales 17
- lumbricalis 17
- lumbricuses 17
- luminarisms 15
- luminarists 13
- luminations 13
- lumisterols 13
- macrophylum 25
- maggotorium 17
- menispermum 19
- mesothorium 18
- ministerium 15
- monumenting 16
- mugwumpisms 23
- mumblements 19
- mumbletypeg 23
- mumpishness 20
- muscatorium 17
- myocardiums 21
- nickumpoops 23
- nototherium 16
- noumenalism 15
- noumenalist 13
- noumenality 16
- nummulation 15
- obumbrating 18
- obumbration 17
- ophidiarium 19
- organistrum 14
- overjumping 26
- panaritiums 15
- panjandarum 23
- paramaecium 19
- parascenium 17
- pentathlums 18
- perfumeless 18
- peridesmium 18
- peridiniums 16
- perimysiums 20
- peritonaeum 15
- plumassiers 15
- plumdamases 18
- plumigerous 16
- plumularian 15
- pneumathode 19
- pneumatical 17
- pneumectomy 22
- pneumograms 18
- polychasium 23
- polygonatum 19
- polyzoarium 27
- postscenium 17
- praetoriums 15
- preconsumed 18
- preconsumes 17
- presternums 15
- preterhuman 18
- procerebrum 19
- prometheums 20
- promycelium 22
- prosternums 15
- prostomiums 17
- puerperiums 17
- quadrumanes 23
- recumbences 19
- rehumanised 17
- rehumanises 16
- reillumined 14
- reillumines 13
- rheumateese 16
- rheumatical 18
- rheumatises 16
- rhumbatrons 18
- rumbullions 15
- rumbustical 17
- rumfustians 16
- rumgumption 18
- rumminesses 15
- scumfishing 22
- seaquariums 22
- sempiternum 17
- sericterium 15
- simillimums 17
- slumberings 16
- slumberless 15
- slumbersome 17
- slumbrously 18
- sparganiums 16
- sphaeridium 19
- spumescence 19
- strumitises 13
- strumpeting 16
- subdelirium 16
- subsumptive 20
- suffumigate 20
- sulphoniums 18
- summeriness 15
- summertides 16
- sumpsimuses 17
- superphylum 23
- suppedaneum 18
- surrogatums 14
- syllabarium 18
- taurobolium 15
- thalictrums 18
- thaumasites 16
- thingumbobs 21
- thrummingly 22
- thumbpieces 22
- thumbstalls 18
- tirociniums 15
- toxalbumins 22
- transhuming 17
- tridominium 16
- triumphings 19
- triumviries 16
- trumpetings 16
- trumpetweed 19
- tumefacient 18
- tumultuated 14
- tumultuates 13
- umbellately 18
- umbellulate 15
- umbonations 15
- umbraculate 17
- umbratilous 15
- umpireships 20
- undertrumps 16
- unhumanised 17
- unhumanises 16
- unhumanized 26
- unhumanizes 25
- unillumined 14
- unslumbrous 15
- verumontana 16
- volumetries 16
- volumometer 18
- xenodochium 26
- xeranthemum 25
- zanthoxylum 35
- zoodendrium 24
- zoogonidium 24
- zoospermium 26
There are 711 11-letter words containing um in the well-known word game dictionary, 363 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 668 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 417 in the Words with Friends (WWF) dictionary.
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