damson plum vs flowering tree

damson plum and flowering tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
damson plum	Yes	No	No	No
flowering tree	Yes	No	No	No

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

damson plum: tropical American timber tree with dark hard heavy wood and small plumlike purple fruit
flowering tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of damson plum include angiospermous tree.

damson plum (noun)	flowering tree (noun)
dark purple plum of the damson tree	any tree having seeds and ovules contained in the ovary
plum tree long cultivated for its edible fruit
tropical American timber tree with dark hard heavy wood and small plumlike purple fruit