TOSA
TOSAS
TOSE
TOSED
TOSES
TOSH
TOSHACH
TOSHACHS
TOSHED
TOSHER
TOSHERS
TOSHES
TOSHIER
TOSHIEST
TOSHING
TOSHY
TOSING
TOSS
TOSSED
TOSSEN
TOSSER
TOSSERS
TOSSES
TOSSICATED
TOSSIER
TOSSIEST
TOSSILY
TOSSING
TOSSINGS
TOSSPOT
TOSSPOTS
TOSSUP
TOSSUPS
TOSSY
TOST
TOSTADA
TOSTADAS
TOSTADO
TOSTADOS
TOSTICATED
TOSTICATION
TOSTICATIONS

42 words start with TOS.