Synonyms of the word

youthfulness

• n. The vitality characteristic of youth.

juvenility

• n. The state or quality of being juvenile.
• n. juvenile behaviour, writing, etc.

youngness

• n. The state or qualities of being young or youthful; youth.

youth

• n. (uncountable) The quality or state of being young.
• n. (uncountable) The part of life following childhood; the period of existence preceding maturity or age;…
• n. (countable) A young person.
• n. (countable) A young man.
• n. (uncountable) (used in plural form) Young persons, collectively.