black sage vs California romero

black sage and California romero both are nouns.

Word	Noun	Adjective	Verb	Adverb
black sage	Yes	No	No	No
California romero	Yes	No	No	No

As nouns, black sage and California romero are synonyms defined as:

black sage and California romero: an aromatic plant with wooly leaves found in southern California and Mexico

Other synonyms of black sage include Trichostema lanatum, wooly blue curls.

black sage (noun)	California romero (noun)
an aromatic plant with wooly leaves found in southern California and Mexico	an aromatic plant with wooly leaves found in southern California and Mexico