chard plant vs common beet

chard plant and common beet both are nouns.

Word	Noun	Adjective	Verb	Adverb
chard plant	Yes	No	No	No
common beet	Yes	No	No	No

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

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

Other hypernyms of chard plant include beet, Beta vulgaris.

chard plant (noun)	common beet (noun)
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