yerba buena vs Micromeria chamissonis

yerba buena and Micromeria chamissonis both are nouns.

Word	Noun	Adjective	Verb	Adverb
yerba buena	Yes	No	No	No
Micromeria chamissonis	Yes	No	No	No

As nouns, yerba buena and Micromeria chamissonis are synonyms defined as:

yerba buena and Micromeria chamissonis: trailing perennial evergreen herb of northwestern United States with small white flowers; used medicinally

Other synonyms of yerba buena include Micromeria douglasii, Satureja douglasii.

yerba buena (noun)	Micromeria chamissonis (noun)
trailing perennial evergreen herb of northwestern United States with small white flowers; used medicinally	trailing perennial evergreen herb of northwestern United States with small white flowers; used medicinally