lion cub vs young carnivore

lion cub and young carnivore both are nouns.

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

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

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

Other hypernyms of lion cub include cub, king of beasts, lion, Panthera leo.

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