catchfly vs wild pink

catchfly and wild pink both are nouns.

Word	Noun	Adjective	Verb	Adverb
catchfly	Yes	No	No	No
wild pink	Yes	No	No	No

As nouns, wild pink is a hyponym of catchfly; that is, wild pink is a word with a more specific, narrower meaning than catchfly:

catchfly: any plant of the genus Silene
wild pink: perennial of eastern and central North America having short-stalked pink or white flowers in hairy clusters

catchfly (noun)	wild pink (noun)
mostly perennial herbs with sticky stems that catch insects; widespread in north temperate zone	perennial of eastern and central North America having short-stalked pink or white flowers in hairy clusters
any plant of the genus Silene	a bog orchid with usually a solitary fragrant magenta pink blossom with a wide gaping corolla; Canada