cub vs tiro

cub and tiro both are nouns.

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

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

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

cub (noun)	tiro (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)	tiro (verb)
give birth to cubs