3
reach its season(expression, idiom)
3
reach voting age(expression, idiom)
3
ready for anything(expression, idiom)
3
refine(verb, smooth, improve, look, enhance)
3
settle down(verb, expression, phrasal verb, advance, develop)
3
settled(adjective, established, developed, adult)
3
shoot up(verb, expression, advance, develop, perfect)
3
spring up(verb, expression, phrasal verb, advance, turn)
3
superannuated(adjective, tired, gray, aged, older)
3
suppurate
3
swell(verb, advance, turn, raise, produce)
3
temper(verb, prepare, preparation, qualify, reconstruct)
3
tried and true(expression, idiom)
3
up in arms(expression, idiom)
3
venerable(adjective, tired, gray, typical, traditional)
3
virile(adjective, adult, adolescence)
2
anneal(verb, prepare, preparation, qualify)
2
arrive(verb, advance, develop, perfect, relax)
2
autumnal
2
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APASmart Define. (2015). mature thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/mature/thesaurus/synonyms
ChicagoSmart Define. 2015. "mature thesaurus" https://smartdefine.org/mature/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, mature thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/mature/thesaurus/synonyms>.
MLASmart Define. "mature thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/mature/thesaurus/synonyms>