bear cub vs young carnivore

bear cub and young carnivore both are nouns.

Word	Noun	Adjective	Verb	Adverb
bear cub	Yes	No	No	No
young carnivore	Yes	No	No	No

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

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

Other hypernyms of bear cub include cub, bear.

bear cub (noun)	young carnivore (noun)
a young bear	the young of certain carnivorous mammals such as the bear or wolf or lion