Merriam-Webster Online Dictionary
grow up (verb)intransitive verb
to grow toward or arrive at full stature or physical or mental maturity - growing up intellectually, socially, and physically
Merriam-Webster Online Thesaurus
grow up (verb)to become mature
SYNONIMS:
age, develop, grow, grow up, progress, ripenRELATED WORDS:
mellow, soften; bloom, blossom, burgeon ( bourgeon), flourish, flower; open, unfold; advance, evolve; get along, get on, gray ( grey)NEAR ANTONYMS:
decay, decline, degenerate, deteriorate, sink, worsen; droop, dry, fade, flag, sag, shrivel, wane, waste (away), weaken, wilt, wither; regress, retrogress, revert; backslide, lapse, return