flowering tree vs angiospermous tree

flowering tree and angiospermous tree both are nouns.

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

As nouns, flowering tree and angiospermous tree are synonyms defined as:

flowering tree and angiospermous tree: any tree having seeds and ovules contained in the ovary

flowering tree (noun)	angiospermous tree (noun)
any tree having seeds and ovules contained in the ovary	any tree having seeds and ovules contained in the ovary