GAID
GAIDS
GAIETIES
GAIETY
GAIJIN
GAILLARD
GAILLARDE
GAILLARDIA
GAILLARDIAS
GAILY
GAIN
GAINABLE
GAINED
GAINER
GAINERS
GAINEST
GAINFUL
GAINFULLY
GAINFULNESS
GAINFULNESSES
GAINGIVING
GAINGIVINGS
GAINING
GAININGS
GAINLESS
GAINLESSNESS
GAINLESSNESSES
GAINLIER
GAINLIEST
GAINLINESS
GAINLINESSES
GAINLY
GAINS
GAINSAID
GAINSAY
GAINSAYER
GAINSAYERS
GAINSAYING
GAINSAYINGS
GAINSAYS
GAINST
GAINSTRIVE
GAINSTRIVED
GAINSTRIVEN
GAINSTRIVES
GAINSTRIVING
GAINSTROVE
GAIR
GAIRFOWL
GAIRFOWLS
GAIRS
GAIT
GAITED
GAITER
GAITERLESS
GAITERS
GAITING
GAITS
GAITT
GAITTS

60 words start with GAI.