tiger cub vs tiger

tiger cub and tiger both are nouns.

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

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

tiger cub: a young tiger
tiger: large feline of forests in most of Asia having a tawny coat with black stripes; endangered

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

tiger cub (noun)	tiger (noun)
a young tiger	large feline of forests in most of Asia having a tawny coat with black stripes; endangered
	a fierce or audacious person