cub

(noun) an awkward and inexperienced youth. Synonyms: greenhorn, rookie.

(noun) a male child (a familiar term of address to a boy). Synonyms: lad, laddie, sonny, sonny boy.

(noun) the young of certain carnivorous mammals such as the bear or wolf or lion. Synonyms: young carnivore.

(verb) give birth to cubs. Example: "Bears cub every year."