spinach beet vs spinach beet

spinach beet and spinach beet both are nouns.

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

spinach beet (noun)	spinach beet (noun)
long succulent whitish stalks with large green leaves	long succulent whitish stalks with large green leaves
beet lacking swollen root; grown as a vegetable for its edible leaves and stalks	beet lacking swollen root; grown as a vegetable for its edible leaves and stalks