DUP
DUPABILITIES
DUPABILITY
DUPABLE
DUPATTA
DUPATTAS
DUPE
DUPED
DUPER
DUPERIES
DUPERS
DUPERY
DUPES
DUPING
DUPION
DUPIONS
DUPLE
DUPLET
DUPLETS
DUPLEX
DUPLEXED
DUPLEXER
DUPLEXERS
DUPLEXES
DUPLEXING
DUPLEXITIES
DUPLEXITY
DUPLICABILITIES
DUPLICABILITY
DUPLICABLE
DUPLICAND
DUPLICANDS
DUPLICATE
DUPLICATED
DUPLICATELY
DUPLICATES
DUPLICATING
DUPLICATION
DUPLICATIONS
DUPLICATIVE
DUPLICATOR
DUPLICATORS
DUPLICATURE
DUPLICATURES
DUPLICIDENT
DUPLICITIES
DUPLICITOUS
DUPLICITOUSLY
DUPLICITY
DUPLIED
DUPLIES
DUPLY
DUPLYING
DUPONDII
DUPONDIUS
DUPPED
DUPPIES
DUPPING
DUPPY
DUPS

60 words start with DUP.