apetalous flower vs flower

apetalous flower and flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
apetalous flower	Yes	No	No	No
flower	Yes	No	Yes	No

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

apetalous flower: flower having no petals
flower: reproductive organ of angiosperm plants especially one having showy or colorful parts

Other hypernyms of apetalous flower include bloom, blossom.

apetalous flower (noun)	flower (noun)
flower having no petals	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

apetalous flower (verb)	flower (verb)
	produce or yield flowers