29 Moby Thesaurus words for "grown up": adult, big, blooming, blossoming, budding, burgeoning, crescent, developed, florescent, flourishing, flowering, full-fledged, full-grown, fully developed, growing, grown, hypertrophied, marriable, marriageable, mature, maturescent, nubile, of age, of marriageable age, old, overdeveloped, overgrown, sprouting, thriving