wild spinach vs fat hen

wild spinach and fat hen both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild spinach	Yes	No	No	No
fat hen	Yes	No	No	No

As nouns, wild spinach and fat hen are synonyms defined as:

wild spinach and fat hen: European plant naturalized in North America; often collected from the wild as a potherb

Other synonyms of wild spinach include allgood, Chenopodium bonus-henricus, good-king-henry.

wild spinach (noun)	fat hen (noun)
leaves collected from the wild	European plant naturalized in North America; often collected from the wild as a potherb
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