tiger cub vs cub

tiger cub and cub both are nouns.

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

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

tiger cub: a young tiger
cub: the young of certain carnivorous mammals such as the bear or wolf or lion

Other hypernyms of tiger cub include young carnivore, Panthera tigris, tiger.

tiger cub (noun)	cub (noun)
a young tiger	the young of certain carnivorous mammals such as the bear or wolf or lion
	a male child (a familiar term of address to a boy)
	an awkward and inexperienced youth

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