stone root vs stone-root

stone root and stone-root both are nouns.

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

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

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

stone root (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