Dianthus plumarius vs cottage pink

Dianthus plumarius and cottage pink both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dianthus plumarius	Yes	No	No	No
cottage pink	Yes	No	No	No

As nouns, Dianthus plumarius and cottage pink are synonyms defined as:

Dianthus plumarius and cottage pink: European pink cultivated for its very fragrant pink or rosy flowers

Other synonyms of Dianthus plumarius include grass pink.

Dianthus plumarius (noun)	cottage pink (noun)
European pink cultivated for its very fragrant pink or rosy flowers	European pink cultivated for its very fragrant pink or rosy flowers