There are a total of 114 9-letter words containing 'dem', and the number may vary in different dictionaries. You can specify the dictionary and order.

• academias ₁₆
• academics ₁₉
• academies ₁₆
• academism ₁₉
• acidemias ₁₆
• bodements ₁₇
• cacodemon ₂₀
• condemned ₁₉
• condemner ₁₈
• condemnor ₁₈
• demagoged ₁₈
• demagogic ₂₀
• demagogue ₁₈
• demandant ₁₆
• demanders ₁₅
• demanding ₁₈
• demantoid ₁₅
• demarcate ₁₆
• demarches ₁₈
• demarking ₂₀
• demassify ₁₈
• demasting ₁₆
• demeaning ₁₇
• demeanors ₁₄
• demeanour ₁₅
• demential ₁₅
• dementias ₁₄
• dementing ₁₇
• demeraras ₁₃
• demergers ₁₅
• demerging ₁₈
• demerited ₁₄
• demijohns ₂₅
• demilunes ₁₆
• demimonde ₁₈
• demission ₁₄
• demisters ₁₃
• demisting ₁₆
• demitasse ₁₃
• demitting ₁₆
• demiurges ₁₆
• demiurgic ₁₉
• demivolts ₁₈
• demiworld ₁₈
• demobbing ₂₂
• democracy ₂₁
• democrats ₁₆
• demoniacs ₁₇
• demonical ₁₈
• demonised ₁₅
• demonises ₁₄
• demonisms ₁₇
• demonists ₁₄
• demonized ₂₄
• demonizes ₂₃
• demotions ₁₄
• demotists ₁₃
• demounted ₁₆
• dempsters ₁₆
• demulcent ₁₉
• demurrage ₁₆
• demurrals ₁₅
• demurrers ₁₄
• demurring ₁₇
• demystify ₂₀
• diademing ₁₇
• edematous ₁₄
• endemisms ₁₇
• epidemics ₁₉
• eudemonic ₁₈
• gamodemes ₁₈
• indemnify ₂₀
• indemnity ₁₇
• myxedemas ₂₅
• myxoedema ₂₅
• pademelon ₁₈
• pandemics ₂₀
• redemands ₁₅
• tidemarks ₁₇
• trademark ₁₇
• vademecum ₂₄
• ademption ₁₄
• demeraran ₁₂
• deminings ₁₃
• demisable ₁₄
• demivolte ₁₅
• demulsify ₁₈
• edematose ₁₂
• endemical ₁₄
• eudemonia ₁₂
• myxedemic ₂₆
• nondemand ₁₃
• sidemeats ₁₂
• abodement ₁₄
• academist ₁₄
• bridemaid ₁₅
• demanning ₁₃
• demarkets ₁₆
• dementate ₁₂
• demersing ₁₃
• demersion ₁₂
• demipique ₂₃
• demissive ₁₅
• demiurgus ₁₃
• demiveges ₁₆
• democraty ₁₇
• demonries ₁₂
• demyships ₂₀
• misdemean ₁₄
• pandemian ₁₄
• pandemias ₁₄
• polydemic ₁₉
• tidemills ₁₂
• vindemial ₁₅

There are 114 9-letter words containing dem in the well-known word game dictionary, 90 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 110 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 81 in the Words with Friends (WWF) dictionary.