HAFF
HAFFET
HAFFETS
HAFFIT
HAFFITS
HAFFLIN
HAFFLINS
HAFFS
HAFIZ
HAFIZES
HAFNIUM
HAFNIUMS
HAFT
HAFTARA
HAFTARAH
HAFTARAHS
HAFTARAS
HAFTAROT
HAFTAROTH
HAFTED
HAFTER
HAFTERS
HAFTING
HAFTORAH
HAFTORAHS
HAFTOROS
HAFTOROT
HAFTOROTH
HAFTS

29 words start with HAF.