stoneroot vs horse balm

stoneroot and horse balm both are nouns.

Word	Noun	Adjective	Verb	Adverb
stoneroot	Yes	No	No	No
horse balm	Yes	No	No	No

As nouns, stoneroot and horse balm are synonyms defined as:

stoneroot and horse balm: erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States

Other synonyms of stoneroot include Collinsonia canadensis, horseweed, richweed, stone-root, stone root.

stoneroot (noun)	horse balm (noun)
erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States	erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States