Nouns

(n)cub, greenhorn, rookiean awkward and inexperienced youth
(n)cub, lad, laddie, sonny, sonny boya male child (a familiar term of address to a boy)
(n)cub, young carnivorethe young of certain carnivorous mammals such as the bear or wolf or lion

Verbs

(v)cubgive birth to cubs“bears cub every year”