There are a total of 76 11-letter words containing 'ology', and the number may vary in different dictionaries. You can specify the dictionary and order.

• aerobiology ₁₉
• agrobiology ₂₁
• agrostology ₁₈
• amphibology ₂₇
• archaeology ₂₁
• autoecology ₂₀
• campanology ₂₆
• climatology ₂₃
• cosmetology ₂₂
• criminology ₂₃
• cryobiology ₂₄
• dactylology ₂₃
• dermatology ₂₀
• diabetology ₂₀
• electrology ₂₀
• eschatology ₂₁
• gerontology ₁₉
• gynaecology ₂₄
• haematology ₂₁
• herpetology ₂₁
• ichthyology ₂₅
• kinesiology ₂₁
• laryngology ₂₂
• lichenology ₂₃
• malariology ₂₀
• martyrology ₂₁
• meteorology ₁₉
• methodology ₂₂
• myrmecology ₂₇
• narratology ₁₇
• neonatology ₁₈
• onomatology ₂₀
• orchidology ₂₂
• ornithology ₁₉
• perissology ₁₉
• phraseology ₂₁
• planetology ₂₁
• primatology ₂₂
• pteridology ₂₀
• reflexology ₂₇
• semasiology ₁₉
• soteriology ₁₆
• terminology ₂₀
• thanatology ₁₉
• vaccinology ₂₇
• venereology ₂₁
• vexillology ₂₉
• victimology ₂₆
• volcanology ₂₅
• vulcanology ₂₆
• agroecology ₁₈
• arachnology ₂₀
• biocenology ₁₉
• carcinology ₁₉
• diabolology ₁₈
• dogmatology ₁₉
• eccrinology ₁₉
• endemiology ₁₈
• gigantology ₁₇
• gnomonology ₁₈
• graminology ₁₈
• heresiology ₁₈
• insectology ₁₇
• odonatology ₁₆
• olfactology ₂₀
• pantheology ₂₀
• sindonology ₁₆
• spectrology ₁₉
• spelaeology ₁₇
• sphagnology ₂₁
• sphygmology ₂₆
• stomatology ₁₇
• suicidology ₁₈
• symbolology ₂₂
• synoecology ₂₀
• syphilology ₂₃

There are 76 11-letter words containing ology in the well-known word game dictionary, 43 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 72 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 50 in the Words with Friends (WWF) dictionary.