There are a total of 125 7-letter words containing 'air', and the number may vary in different dictionaries. You can specify the dictionary and order.

• affaire ₁₃
• affairs ₁₃
• airbags ₁₂
• airball ₁₂
• airband ₁₂
• airbase ₁₀
• airbeds ₁₁
• airboat ₁₀
• aircrew ₁₃
• airdash ₁₀
• airdate ₈
• airdrop ₁₁
• airfare ₁₀
• airflow ₁₄
• airfoil ₁₁
• airglow ₁₃
• airguns ₁₁
• airhead ₁₀
• airhole ₁₀
• airhorn ₁₀
• airiest ₇
• airings ₁₀
• airless ₈
• airlift ₁₁
• airlike ₁₂
• airline ₉
• airlock ₁₅
• airmail ₁₁
• airmass ₁₀
• airmiss ₁₀
• airpark ₁₄
• airplay ₁₃
• airport ₁₀
• airpost ₁₀
• airpots ₁₀
• airshed ₁₀
• airship ₁₂
• airshow ₁₂
• airsick ₁₄
• airside ₈
• airthed ₁₀
• airtime ₁₀
• airting ₁₀
• airward ₁₁
• airwave ₁₄
• airways ₁₂
• airwise ₁₀
• antiair ₈
• bairnly ₁₄
• cairned ₁₂
• chaired ₁₃
• cochair ₁₅
• corsair ₁₀
• dairies ₈
• deaired ₉
• despair ₁₁
• eclairs ₁₁
• fairest ₁₀
• fairies ₁₀
• fairing ₁₃
• fairish ₁₂
• fairway ₁₅
• funfair ₁₅
• glaired ₁₁
• glaires ₁₀
• haircap ₁₅
• haircut ₁₃
• hairdos ₁₀
• hairier ₉
• hairily ₁₂
• hairnet ₁₀
• hairpin ₁₃
• hetaira ₉
• impairs ₁₃
• lairage ₁₀
• lairdly ₁₂
• lairier ₈
• lairing ₁₁
• machair ₁₅
• midairs ₁₁
• mohairs ₁₂
• pairing ₁₃
• prairie ₁₀
• repairs ₁₀
• shairds ₁₀
• shairns ₁₀
• thairms ₁₂
• unaired ₁₀
• unhairs ₁₁
• upstair ₁₁
• wairing ₁₃
• airshot ₁₀
• airsome ₉
• airtram ₉
• airvacs ₁₂
• dehairs ₁₁
• donairs ₈
• fairier ₁₀
• unchair ₁₂
• airgaps ₁₀
• airning ₈
• airstop ₉
• appairs ₁₁
• brairds ₁₀
• empaire ₁₁
• fairily ₁₃
• forfair ₁₃
• furfair ₁₃
• glairin ₈
• hairifs ₁₃
• hairing ₁₁
• hairsts ₁₀
• lairise ₇
• lairize ₁₆
• pairest ₉
• pairial ₉
• sairest ₇
• sairing ₈
• slairgs ₈
• spairge ₁₀
• staired ₈
• taraire ₇
• unfairs ₁₀
• vairier ₁₀
• wairuas ₁₀

There are 125 7-letter words containing air in the well-known word game dictionary, 89 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 109 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 91 in the Words with Friends (WWF) dictionary.