pigweed vs Chenopodium album

pigweed and Chenopodium album both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigweed	Yes	No	No	No
Chenopodium album	Yes	No	No	No

As nouns, pigweed and Chenopodium album are synonyms defined as:

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

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

pigweed (noun)	Chenopodium album (noun)
leaves collected from the wild	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