orchid tree vs flowering tree

orchid tree and flowering tree both are nouns.

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

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

orchid tree: small East Indian tree having orchid-like flowers and hard dark wood
flowering tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of orchid tree include angiospermous tree.

orchid tree (noun)	flowering tree (noun)
small East Indian tree having orchid-like flowers and hard dark wood	any tree having seeds and ovules contained in the ovary