kitten-tails vs wildflower

kitten-tails and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
kitten-tails	Yes	No	No	No
wildflower	Yes	No	No	No

As nouns, wildflower is a hypernym of kitten-tails; that is, wildflower is a word with a broader meaning than kitten-tails:

Other hypernyms of kitten-tails include wild flower.

kitten-tails (noun)	wildflower (noun)
a plant of the genus Besseya having fluffy spikes of flowers	wild or uncultivated flowering plant