There are a total of 64 11-letter words containing 'therm', and the number may vary in different dictionaries. You can specify the dictionary and order.

• diathermies ₁₇
• ectothermic ₂₂
• endothermal ₁₉
• endothermic ₂₁
• eurythermal ₂₀
• eurythermic ₂₂
• farthermost ₁₉
• furthermore ₂₀
• furthermost ₂₀
• homeotherms ₂₁
• homeothermy ₂₃
• homoiotherm ₂₁
• hypothermal ₂₄
• hypothermia ₂₃
• hypothermic ₂₆
• isogeotherm ₁₈
• isothermals ₁₇
• stenotherms ₁₇
• thermalised ₁₈
• thermalises ₁₇
• thermalized ₂₇
• thermalizes ₂₆
• thermically ₂₃
• thermionics ₂₀
• thermistors ₁₆
• thermobaric ₂₂
• thermocline ₂₁
• thermoduric ₂₁
• thermoforms ₂₂
• thermogenic ₂₂
• thermograms ₂₁
• thermograph ₂₃
• thermokarst ₂₀
• thermolysis ₁₉
• thermolytic ₂₂
• thermometer ₁₉
• thermometry ₂₁
• thermophile ₂₂
• thermophils ₂₂
• thermopiles ₂₀
• thermoscope ₂₂
• thermostats ₁₆
• thermotaxes ₂₃
• thermotaxis ₂₃
• xerothermic ₂₆
• nonthermals ₁₆
• adiathermic ₁₉
• athermanous ₁₆
• diathermacy ₂₂
• diathermias ₁₇
• diathermous ₁₇
• farthermore ₁₉
• homothermal ₂₁
• homothermic ₂₃
• hyperthermy ₂₇
• northermost ₁₆
• radiothermy ₂₀
• southermost ₁₆
• thermolyses ₁₉
• thermomotor ₁₈
• thermonasty ₁₉
• thermotaxic ₂₅
• thermotical ₁₈
• weathermost ₁₉

There are 64 11-letter words containing therm in the well-known word game dictionary, 36 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 62 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 45 in the Words with Friends (WWF) dictionary.