pigweed vs goosefoot

pigweed and goosefoot both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigweed	Yes	No	No	No
goosefoot	Yes	No	No	No

As nouns, goosefoot is a hypernym of pigweed; that is, goosefoot is a word with a broader meaning than pigweed:

pigweed: common weedy European plant introduced into North America; often used as a potherb
goosefoot: any of various weeds of the genus Chenopodium having small greenish flowers

pigweed (noun)	goosefoot (noun)
leaves collected from the wild	any of various weeds of the genus Chenopodium having small greenish flowers
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