redbud vs angiospermous tree

redbud and angiospermous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
redbud	Yes	No	No	No
angiospermous tree	Yes	No	No	No

As nouns, angiospermous tree is a hypernym of redbud; that is, angiospermous tree is a word with a broader meaning than redbud:

redbud: small shrubby tree of eastern North America similar to the Judas tree having usually pink flowers; found in damp sheltered underwood
angiospermous tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of redbud include flowering tree.

redbud (noun)	angiospermous tree (noun)
small shrubby tree of eastern North America similar to the Judas tree having usually pink flowers; found in damp sheltered underwood	any tree having seeds and ovules contained in the ovary