ear：fear bear hear swear dear year near
earache,earl,early,earn,earphone,earring,earth,earthing,earthworm
ai sk：air ask sky skirt aic,aicpa,aiha,air,airgun,airline,airport ,airsick,airway
skate,skeleton,sketch,skew,ski,sky,skiff,skill,skillful,skim,skimming,skin,skip,skipjack,skipper,sku,skyhawk,skylark