wild oats vs flower

wild oats and flower both are nouns.

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

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

wild oats: any of various plants of the genus Uvularia having yellowish drooping bell-shaped flowers
flower: a plant cultivated for its blooms or blossoms

wild oats (noun)	flower (noun)
any of various plants of the genus Uvularia having yellowish drooping bell-shaped flowers	a plant cultivated for its blooms or blossoms
	reproductive organ of angiosperm plants especially one having showy or colorful parts
	the period of greatest prosperity or productivity

wild oats (verb)	flower (verb)
	produce or yield flowers