western mugwort vs white sage

western mugwort and white sage both are nouns.

Word	Noun	Adjective	Verb	Adverb
western mugwort	Yes	No	No	No
white sage	Yes	No	No	No

As nouns, western mugwort and white sage are synonyms defined as:

western mugwort and white sage: perennial cottony-white herb of southwestern United States

Other synonyms of western mugwort include Artemisia gnaphalodes, Artemisia ludoviciana, cudweed, prairie sage.

western mugwort (noun)	white sage (noun)
perennial cottony-white herb of southwestern United States	perennial cottony-white herb of southwestern United States