There are a total of 165 9-letter words containing 'air', and the number may vary in different dictionaries. You can specify the dictionary and order.

• airbrakes ₁₆
• airbricks ₁₉
• airbridge ₁₅
• airbursts ₁₃
• airbusses ₁₃
• airchecks ₂₁
• aircooled ₁₄
• aircooler ₁₃
• airdashed ₁₃
• airdashes ₁₂
• airdromes ₁₃
• airfields ₁₄
• airforces ₁₅
• airframes ₁₅
• airheaded ₁₃
• airlifted ₁₄
• airliners ₁₁
• airmailed ₁₄
• airmasses ₁₂
• airmisses ₁₂
• airmobile ₁₆
• airplanes ₁₄
• airpowers ₁₅
• airproofs ₁₅
• airscapes ₁₅
• airscrews ₁₅
• airshafts ₁₄
• airspaces ₁₅
• airspeeds ₁₃
• airstream ₁₂
• airstrike ₁₃
• airstrips ₁₂
• airworthy ₁₆
• armchairs ₁₇
• bairnlier ₁₄
• basepairs ₁₅
• bathchair ₁₉
• bedchairs ₁₈
• cairngorm ₁₈
• camelhair ₁₈
• chairlady ₁₈
• chairlift ₁₈
• chairmans ₁₈
• cochaired ₁₈
• crosshair ₁₄
• dairyings ₁₅
• dairymaid ₁₆
• deckchair ₂₂
• despaired ₁₄
• despairer ₁₃
• disrepair ₁₃
• fairishly ₁₇
• fairleads ₁₄
• fairsized ₂₂
• fairtrade ₁₃
• fairwater ₁₅
• fairyisms ₁₇
• fairyland ₁₇
• fairylike ₁₉
• fairytale ₁₅
• glairiest ₁₂
• hairballs ₁₆
• hairbands ₁₆
• hairbrush ₁₇
• haircloth ₁₇
• hairdrier ₁₂
• hairdryer ₁₄
• hairgrips ₁₆
• hairiness ₁₂
• hairlines ₁₃
• hairlocks ₁₉
• hairpiece ₁₇
• hairshirt ₁₃
• hairslide ₁₃
• hairspray ₁₆
• hairstyle ₁₄
• hairworks ₁₈
• hairworms ₁₇
• highchair ₂₀
• horsehair ₁₃
• impairers ₁₅
• impairing ₁₈
• kairomone ₁₇
• lairdship ₁₆
• lawnchair ₁₉
• longhairs ₁₅
• luminaire ₁₅
• megadairy ₁₇
• mushairas ₁₅
• numeraire ₁₄
• ordinaire ₁₁
• pushchair ₂₀
• repairers ₁₂
• repairing ₁₅
• repairman ₁₆
• repairmen ₁₆
• sanitaire ₁₀
• shorthair ₁₃
• solitaire ₁₀
• staircase ₁₂
• stairhead ₁₂
• stairlift ₁₃
• stairways ₁₄
• stairwell ₁₄
• unfairest ₁₄
• unhairing ₁₆
• unrepairs ₁₄
• wirehairs ₁₄
• backstair ₁₇
• debonaire ₁₂
• dehairing ₁₄
• downstair ₁₃
• fairgoers ₁₃
• fairyhood ₁₉
• hairwings ₁₆
• hetairism ₁₄
• moosehair ₁₄
• sidechair ₁₅
• stairless ₉
• stairlike ₁₃
• stairstep ₁₁
• unchaired ₁₅
• underhair ₁₃
• unhairers ₁₂
• wingchair ₁₈
• airgraphs ₁₅
• appairing ₁₄
• bairnlike ₁₅
• brairding ₁₃
• camstairy ₁₆
• chairdays ₁₈
• empairing ₁₄
• fairfaced ₁₈
• fairydoms ₁₈
• forestair ₁₂
• forfaired ₁₆
• gairfowls ₁₆
• glaireous ₁₀
• hairbells ₁₄
• hairsting ₁₃
• hairtails ₁₂
• hairyback ₂₃
• headchair ₁₈
• hetairias ₁₂
• hetairist ₁₂
• kailyaird ₁₇
• kirkyaird ₂₁
• lairising ₁₀
• lairizing ₁₉
• libraires ₁₁
• librairie ₁₁
• mairehaus ₁₄
• metairies ₁₁
• overhairs ₁₅
• slairging ₁₁
• spairging ₁₃
• sphairees ₁₄
• stairfoot ₁₂
• stairwise ₁₂
• stairwork ₁₆
• stepbairn ₁₃
• taghairms ₁₅
• unfairing ₁₃
• wairshest ₁₅
• whakairos ₁₉

There are 165 9-letter words containing air in the well-known word game dictionary, 96 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 140 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 108 in the Words with Friends (WWF) dictionary.