rosiness vs pink

rosiness and pink both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosiness	Yes	No	No	No
pink	Yes	Yes	Yes	No

As nouns, pink is a hypernym of rosiness; that is, pink is a word with a broader meaning than rosiness:

rosiness (noun)	pink (noun)
a healthy reddish complexion	a light shade of red
a dusty pink color	a person with mildly leftist political views
a rosy color (especially in the cheeks) taken as a sign of good health	any of various flowers of plants of the genus Dianthus cultivated for their fragrant flowers

rosiness (adjective)	pink (adjective)
	of a light shade of red

rosiness (verb)	pink (verb)
	cut in a zigzag pattern with pinking shears, in sewing
	make light, repeated taps on a surface
	sound like a car engine that is firing too early