silky elm vs flowering tree

silky elm and flowering tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
silky elm	Yes	No	No	No
flowering tree	Yes	No	No	No

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

Other hypernyms of silky elm include angiospermous tree.

silky elm (noun)	flowering tree (noun)
large tree of Australasia	any tree having seeds and ovules contained in the ovary