mayweed vs dog fennel

mayweed and dog fennel both are nouns.

Word	Noun	Adjective	Verb	Adverb
mayweed	Yes	No	No	No
dog fennel	Yes	No	No	No

As nouns, mayweed and dog fennel are synonyms defined as:

mayweed and dog fennel: widespread rank-smelling weed having white-rayed flower heads with yellow discs

Other synonyms of mayweed include Anthemis cotula, stinking chamomile, stinking mayweed.

mayweed (noun)	dog fennel (noun)
widespread rank-smelling weed having white-rayed flower heads with yellow discs	widespread rank-smelling weed having white-rayed flower heads with yellow discs
	weedy plant of southeastern United States having divided leaves and long clusters of greenish flowers