CAG
CAGANER
CAGANERS
CAGE
CAGEBIRD
CAGEBIRDS
CAGED
CAGEFUL
CAGEFULS
CAGELIKE
CAGELING
CAGELINGS
CAGER
CAGERS
CAGES
CAGEWORK
CAGEWORKS
CAGEY
CAGEYNESS
CAGEYNESSES
CAGIER
CAGIEST
CAGILY
CAGINESS
CAGINESSES
CAGING
CAGMAG
CAGMAGGED
CAGMAGGING
CAGMAGS
CAGOT
CAGOTS
CAGOUL
CAGOULE
CAGOULES
CAGOULS
CAGS
CAGY
CAGYNESS
CAGYNESSES

40 words start with CAG.