beetroot vs beet green

beetroot and beet green both are nouns.

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

beetroot (noun)	beet green (noun)
round red root vegetable	young leaves of the beetroot
beet having a massively swollen red root; widely grown for human consumption