sunray vs wild flower

sunray and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunray	Yes	No	No	No
wild flower	Yes	No	No	No

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

sunray: herb having a basal cluster of grey-green leaves and leafless stalks each with a solitary broad yellow flower head; desert areas Idaho to Arizona
wild flower: wild or uncultivated flowering plant

Other hypernyms of sunray include wildflower.

sunray (noun)	wild flower (noun)
a ray of sunlight	wild or uncultivated flowering plant
a ray of artificial ultraviolet light from a sunray lamp
herb having a basal cluster of grey-green leaves and leafless stalks each with a solitary broad yellow flower head; desert areas Idaho to Arizona