youth

(noun) a young person (especially a young man or boy). Synonyms: young person, younker, spring chicken.

(noun) young people collectively. Synonyms: young. Examples: "Rock music appeals to the young." "Youth everywhere rises in revolt."

(noun) the time of life between childhood and maturity.

(noun) early maturity; the state of being young or immature or inexperienced.

(noun) an early period of development. Synonyms: early days. Example: "During the youth of the project."

(noun) the freshness and vitality characteristic of a young person. Synonyms: youthfulness, juvenility.