radish vs root vegetable

radish and root vegetable both are nouns.

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

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

Other hypernyms of radish include cruciferous vegetable.

radish (noun)	root vegetable (noun)
pungent fleshy edible root	any of various fleshy edible underground roots or tubers
Eurasian plant widely cultivated for its edible pungent root usually eaten raw
pungent edible root of any of various cultivated radish plants
radish of Japan with a long hard durable root eaten raw or cooked
a cruciferous plant of the genus Raphanus having a pungent edible root