rainbow pink vs Dianthus chinensis

rainbow pink and Dianthus chinensis both are nouns.

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

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

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

Other synonyms of rainbow pink include china pink.

rainbow pink (noun)	Dianthus chinensis (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