cub vs tyro

cub and tyro both are nouns.

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

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

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

cub (noun)	tyro (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)
an awkward and inexperienced youth

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