Spanish elm vs flowering tree

Spanish elm and flowering tree both are nouns.

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

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

Spanish elm: large tropical American tree of the genus Cordia grown for its abundant creamy white flowers and valuable wood
flowering tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of Spanish elm include angiospermous tree.

Spanish elm (noun)	flowering tree (noun)
tropical American timber tree	any tree having seeds and ovules contained in the ovary
large tropical American tree of the genus Cordia grown for its abundant creamy white flowers and valuable wood