Synonyms for adult

Noun

1. adult, grownup, person, individual, someone, somebody, mortal, human, soul

usage: a fully developed person from maturity onward

2. adult, animal, animate being, beast, brute, creature, fauna

usage: any mature animal

Adjective

1. adult, big, full-grown, fully grown, grown, grownup, mature (vs. immature)

usage: (of animals) fully developed; "an adult animal"; "a grown woman"