stone-root vs horse balm

stone-root and horse balm both are nouns.

Word	Noun	Adjective	Verb	Adverb
stone-root	Yes	No	No	No
horse balm	Yes	No	No	No

As nouns, stone-root and horse balm are synonyms defined as:

stone-root 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 stone-root include Collinsonia canadensis, horseweed, richweed, stone root, stoneroot.

stone-root (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