BAD
BADASS
BADASSED
BADASSES
BADDELEYITE
BADDELEYITES
BADDER
BADDERLOCK
BADDERLOCKS
BADDEST
BADDIE
BADDIES
BADDISH
BADDY
BADE
BADGE
BADGED
BADGELESS
BADGER
BADGERED
BADGERING
BADGERLY
BADGERS
BADGES
BADGING
BADINAGE
BADINAGED
BADINAGES
BADINAGING
BADINERIE
BADINERIES
BADIOUS
BADLAND
BADLANDS
BADLY
BADMAN
BADMASH
BADMASHES
BADMEN
BADMINTON
BADMINTONS
BADMOUTH
BADMOUTHED
BADMOUTHING
BADMOUTHS
BADNESS
BADNESSES
BADS

48 words start with BAD.