balsa vs angiospermous tree

balsa and angiospermous tree both are nouns.

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

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

balsa: forest tree of lowland Central America having a strong very light wood; used for making floats and rafts and in crafts
angiospermous tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of balsa include flowering tree.

balsa (noun)	angiospermous tree (noun)
forest tree of lowland Central America having a strong very light wood; used for making floats and rafts and in crafts	any tree having seeds and ovules contained in the ovary
strong lightweight wood of the balsa tree used especially for floats