Johnny-jump-up vs pink of my John

Johnny-jump-up and pink of my John both are nouns.

Word	Noun	Adjective	Verb	Adverb
Johnny-jump-up	Yes	No	No	No
pink of my John	Yes	No	No	No

As nouns, Johnny-jump-up and pink of my John are synonyms defined as:

Johnny-jump-up and pink of my John: a common and long cultivated European herb from which most common garden pansies are derived

Other synonyms of Johnny-jump-up include heartsease, love-in-idleness, Viola tricolor, wild pansy.

Johnny-jump-up (noun)	pink of my John (noun)
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
a common and long cultivated European herb from which most common garden pansies are derived