wild spinach vs greens

wild spinach and greens both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild spinach	Yes	No	No	No
greens	Yes	No	No	No

As nouns, greens is a hypernym of wild spinach; that is, greens is a word with a broader meaning than wild spinach:

wild spinach: leaves collected from the wild
greens: any of various leafy plants or their leaves and stems eaten as vegetables

Other hypernyms of wild spinach include green, leafy vegetable.

As nouns, greens is a hypernym of wild spinach; that is, greens is a word with a broader meaning than wild spinach:

wild spinach: leafy greens collected from the wild and used as a substitute for spinach
greens: any of various leafy plants or their leaves and stems eaten as vegetables

Other hypernyms of wild spinach include green, leafy vegetable.

wild spinach (noun)	greens (noun)
leaves collected from the wild	any of various leafy plants or their leaves and stems eaten as vegetables
leafy greens collected from the wild and used as a substitute for spinach
common weedy European plant introduced into North America; often used as a potherb
European plant naturalized in North America; often collected from the wild as a potherb