angiosperm vs flower

angiosperm and flower both are nouns.

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

As nouns, flower is a hyponym of angiosperm; that is, flower is a word with a more specific, narrower meaning than angiosperm:

angiosperm (noun)	flower (noun)
plants having seeds in a closed ovary	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

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