grass pink vs cottage pink

grass pink and cottage pink both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass pink	Yes	No	No	No
cottage pink	Yes	No	No	No

As nouns, grass pink and cottage pink are synonyms defined as:

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

Other synonyms of grass pink include Dianthus plumarius.

grass pink (noun)	cottage pink (noun)
an orchid	European pink cultivated for its very fragrant pink or rosy flowers
European pink cultivated for its very fragrant pink or rosy flowers