Johnny-jump-up vs pansy violet

Johnny-jump-up and pansy violet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Johnny-jump-up	Yes	No	No	No
pansy violet	Yes	No	No	No

As nouns, Johnny-jump-up and pansy violet are synonyms defined as:

Johnny-jump-up and pansy violet: common violet of the eastern United States with large pale blue or purple flowers resembling pansies

Other synonyms of Johnny-jump-up include bird's-foot violet, Viola pedata, wood violet.

Johnny-jump-up (noun)	pansy violet (noun)
common violet of the eastern United States with large pale blue or purple flowers resembling pansies	common violet of the eastern United States with large pale blue or purple flowers resembling pansies
a common and long cultivated European herb from which most common garden pansies are derived