carrot vs root vegetable

carrot and root vegetable both are nouns.

Word	Noun	Adjective	Verb	Adverb
carrot	Yes	No	No	No
root vegetable	Yes	No	No	No

As nouns, root vegetable is a hypernym of carrot; that is, root vegetable is a word with a broader meaning than carrot:

carrot (noun)	root vegetable (noun)
promise of reward as in "carrot and stick"	any of various fleshy edible underground roots or tubers
orange root; important source of carotene
perennial plant widely cultivated as an annual in many varieties for its long conical orange edible roots; temperate and tropical regions
deep orange edible root of the cultivated carrot plant