dicotyledon vs angiosperm

dicotyledon and angiosperm both are nouns.

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

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

dicotyledon: flowering plant with two cotyledons; the stem grows by deposit on its outside
angiosperm: plants having seeds in a closed ovary

Other hypernyms of dicotyledon include flowering plant.

dicotyledon (noun)	angiosperm (noun)
flowering plant with two cotyledons; the stem grows by deposit on its outside	plants having seeds in a closed ovary