beetroot vs common beet

beetroot and common beet both are nouns.

Word	Noun	Adjective	Verb	Adverb
beetroot	Yes	No	No	No
common beet	Yes	No	No	No

As nouns, common beet is a hypernym of beetroot; that is, common beet is a word with a broader meaning than beetroot:

beetroot: beet having a massively swollen red root; widely grown for human consumption
common beet: biennial Eurasian plant usually having a swollen edible root; widely cultivated as a food crop

Other hypernyms of beetroot include beet, Beta vulgaris.

beetroot (noun)	common beet (noun)
round red root vegetable	biennial Eurasian plant usually having a swollen edible root; widely cultivated as a food crop
beet having a massively swollen red root; widely grown for human consumption