There are a total of 103 11-letter words containing 'war', and the number may vary in different dictionaries. You can specify the dictionary and order.

• abandonware ₂₀
• athwartship ₂₁
• awarenesses ₁₅
• awkwardness ₂₃
• becowarding ₂₄
• benchwarmer ₂₆
• cassowaries ₁₇
• coursewares ₁₈
• crackleware ₂₅
• crystalware ₂₀
• dinnerwares ₁₇
• downwarping ₂₅
• dwarfnesses ₁₉
• earthenware ₁₇
• ecowarriors ₁₇
• enamelwares ₁₉
• equatorward ₂₅
• feedforward ₂₂
• forewarners ₁₈
• forewarning ₂₁
• forwardness ₁₉
• frowardness ₁₉
• graniteware ₁₇
• greenswards ₁₈
• heavenwards ₂₂
• hollowwares ₂₁
• jasperwares ₂₆
• kitchenware ₂₄
• lacquerware ₂₈
• lusterwares ₁₆
• misawarding ₂₁
• mouldiwarps ₂₃
• mouldywarps ₂₅
• northwardly ₂₁
• outwardness ₁₇
• overwarming ₂₄
• rewardingly ₂₁
• schwarmerei ₂₂
• semidwarves ₂₂
• silverwares ₁₉
• southwardly ₂₁
• spatterware ₁₇
• spongewares ₂₀
• stewardries ₁₅
• stewardship ₂₀
• stewartries ₁₄
• swarthiness ₁₇
• swartnesses ₁₅
• thitherward ₁₉
• unawareness ₁₇
• unrewarding ₂₀
• unwarranted ₁₈
• wardenships ₂₁
• warehousers ₁₇
• warehousing ₂₀
• warfighters ₂₁
• warlordisms ₁₉
• warmblooded ₂₃
• warmhearted ₂₀
• warrantable ₁₉
• warrantably ₂₁
• warrantless ₁₆
• waywardness ₂₁
• whitherward ₂₂
• willowwares ₂₂
• woodenwares ₁₉
• yellowwares ₂₁
• biowarfares ₁₉
• plasticware ₁₈
• warrantying ₁₈
• afterswarms ₁₉
• basaltwares ₁₆
• churchwards ₂₅
• cowardships ₂₂
• crippleware ₂₀
• firewardens ₁₈
• forwardings ₁₉
• hardwareman ₂₀
• hardwaremen ₂₀
• hitherwards ₂₁
• lukewarmish ₂₃
• lukewarmths ₂₃
• lustrewares ₁₄
• moudiewarts ₁₇
• mowdiewarts ₂₀
• netherwards ₁₈
• overforward ₂₁
• overthwarts ₂₀
• raiyatwaris ₁₇
• schoolwards ₂₀
• schwarzlots ₂₈
• streetwards ₁₅
• thwartingly ₂₁
• thwartships ₂₂
• vapourwares ₁₉
• warchalkers ₂₃
• warchalking ₂₄
• warderships ₂₀
• warlikeness ₁₈
• warlockries ₂₀
• warrandices ₁₇
• warrantings ₁₅
• warrantises ₁₄

There are 103 11-letter words containing war in the well-known word game dictionary, 55 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 93 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 67 in the Words with Friends (WWF) dictionary.