wild spinach vs leafy vegetable

wild spinach and leafy vegetable both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild spinach	Yes	No	No	No
leafy vegetable	Yes	No	No	No

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

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

Other hypernyms of wild spinach include green, greens.

As nouns, leafy vegetable is a hypernym of wild spinach; that is, leafy vegetable 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
leafy vegetable: any of various leafy plants or their leaves and stems eaten as vegetables

Other hypernyms of wild spinach include green, greens.

wild spinach (noun)	leafy vegetable (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