cub vs beginner

cub and beginner both are nouns.

Word	Noun	Adjective	Verb	Adverb
cub	Yes	No	Yes	No
beginner	Yes	No	No	No

As nouns, beginner is a hypernym of cub; that is, beginner is a word with a broader meaning than cub:

Other hypernyms of cub include initiate, novice, tiro, tyro.

cub (noun)	beginner (noun)
the young of certain carnivorous mammals such as the bear or wolf or lion	someone new to a field or activity
a male child (a familiar term of address to a boy)	a person who founds or establishes some institution
an awkward and inexperienced youth

cub (verb)	beginner (verb)
give birth to cubs