13
youth(noun, time, start, opening, period)
12
juvenility(noun, time, start, opening, prime)
7
adolescence(noun, state, time, start, opening)
5
greenness(noun, time, start, opening, prime)
5
immaturity(noun, prime, spring, innocence, youth)
5
prime(noun, start, beginning, opening, spring)
5
puberty(noun, time, start, opening, prime)
3
juvenescence(noun, time, prime, spring, potency)
3
prime of life(expression, idiom)
3
salad days(noun, expression, time, prime, spring)
3
spring(noun, time, prime, youth, adolescence)
2
bloom(noun, enthusiasm, prime, spring, youth)
2
boyhood(noun, prime, spring, youth, childhood)
2
callowness
2
freshness
2
jejuneness
2
minority(noun, prime, spring, age, youth)
2
tender age(noun, expression, prime, spring, innocence)
2
young
2
youngness
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APASmart Define. (2015). youthfulness thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/youthfulness/thesaurus/synonyms
ChicagoSmart Define. 2015. "youthfulness thesaurus" https://smartdefine.org/youthfulness/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, youthfulness thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/youthfulness/thesaurus/synonyms>.
MLASmart Define. "youthfulness thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/youthfulness/thesaurus/synonyms>