Dianthus chinensis vs rainbow pink

Dianthus chinensis and rainbow pink both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dianthus chinensis	Yes	No	No	No
rainbow pink	Yes	No	No	No

As nouns, Dianthus chinensis and rainbow pink are synonyms defined as:

Dianthus chinensis and rainbow pink: Chinese pink with deeply toothed rose-lilac flowers with a purplish eye; usually raised as an annual

Other synonyms of Dianthus chinensis include china pink.

Dianthus chinensis (noun)	rainbow pink (noun)
Chinese pink with deeply toothed rose-lilac flowers with a purplish eye; usually raised as an annual	Chinese pink with deeply toothed rose-lilac flowers with a purplish eye; usually raised as an annual