scarlet bugler vs wild flower

scarlet bugler and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
scarlet bugler	Yes	No	No	No
wild flower	Yes	No	No	No

As nouns, wild flower is a hypernym of scarlet bugler; that is, wild flower is a word with a broader meaning than scarlet bugler:

scarlet bugler: plant with bright red tubular flowers in long narrow clusters near tips of erect stems; coastal ranges from central California southward
wild flower: wild or uncultivated flowering plant

Other hypernyms of scarlet bugler include wildflower.

scarlet bugler (noun)	wild flower (noun)
plant with bright red tubular flowers in long narrow clusters near tips of erect stems; coastal ranges from central California southward	wild or uncultivated flowering plant