button pink vs Dianthus latifolius

button pink and Dianthus latifolius both are nouns.

Word	Noun	Adjective	Verb	Adverb
button pink	Yes	No	No	No
Dianthus latifolius	Yes	No	No	No

As nouns, button pink and Dianthus latifolius are synonyms defined as:

button pink and Dianthus latifolius: much-branched pink with flowers in clusters; closely related to sweet William

button pink (noun)	Dianthus latifolius (noun)
much-branched pink with flowers in clusters; closely related to sweet William	much-branched pink with flowers in clusters; closely related to sweet William