JAP
JAPAN
JAPANISE
JAPANISED
JAPANISES
JAPANISING
JAPANIZE
JAPANIZED
JAPANIZES
JAPANIZING
JAPANNED
JAPANNER
JAPANNERS
JAPANNING
JAPANS
JAPE
JAPED
JAPER
JAPERIES
JAPERS
JAPERY
JAPES
JAPING
JAPINGLY
JAPINGS
JAPONAISERIE
JAPONAISERIES
JAPONICA
JAPONICAS
JAPPED
JAPPING
JAPS

32 words start with JAP.