wormseed vs American wormseed

wormseed and American wormseed both are nouns.

Word	Noun	Adjective	Verb	Adverb
wormseed	Yes	No	No	No
American wormseed	Yes	No	No	No

As nouns, wormseed and American wormseed are synonyms defined as:

Other synonyms of wormseed include Chenopodium ambrosioides, Mexican tea, Spanish tea.

wormseed (noun)	American wormseed (noun)
rank-smelling tropical American pigweed	rank-smelling tropical American pigweed