flower vs angiosperm

flower and angiosperm both are nouns.

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

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

Other hypernyms of flower include flowering plant.

flower (noun)	angiosperm (noun)
a plant cultivated for its blooms or blossoms	plants having seeds in a closed ovary
reproductive organ of angiosperm plants especially one having showy or colorful parts
the period of greatest prosperity or productivity

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