Synonyms of adult

1 Syllable
couth, mare, ripe, grown, porn, squaw
2 Syllables
stallion, jetset, ripest, grown-up, full-blown, ladies, jet-set, lady, riper, missus, grownup
3 Syllables
caveman, x-rated, ripened, world-weary, mondaine
4 Syllables
pornographic, marriageable, developed, masculine
5 Syllables
sophisticated