wild spinach vs pigweed

wild spinach and pigweed both are nouns.

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

As nouns, wild spinach and pigweed are synonyms defined as:

Other synonyms of wild spinach include lamb's-quarter.

As nouns, wild spinach and pigweed are synonyms defined as:

wild spinach and pigweed: common weedy European plant introduced into North America; often used as a potherb

Other synonyms of wild spinach include Chenopodium album, lamb's-quarters.

wild spinach (noun)	pigweed (noun)
leaves collected from the wild	leaves collected from the wild
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
common weedy European plant introduced into North America; often used as a potherb	leaves sometimes used as potherbs; seeds used as cereal; southern United States to Central America; India and China
European plant naturalized in North America; often collected from the wild as a potherb