leaf beet vs beet

leaf beet and beet both are nouns.

Word	Noun	Adjective	Verb	Adverb
leaf beet	Yes	No	No	No
beet	Yes	No	No	No

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

leaf beet: beet lacking swollen root; grown as a vegetable for its edible leaves and stalks
beet: biennial Eurasian plant usually having a swollen edible root; widely cultivated as a food crop

Other hypernyms of leaf beet include Beta vulgaris, common beet.

leaf beet (noun)	beet (noun)
long succulent whitish stalks with large green leaves	round red root vegetable
beet lacking swollen root; grown as a vegetable for its edible leaves and stalks	biennial Eurasian plant usually having a swollen edible root; widely cultivated as a food crop