horse balm vs stone-root

horse balm and stone-root both are nouns.

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

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

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

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

horse balm (noun)	stone-root (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