iron tree vs flowering tree

iron tree and flowering tree both are nouns.

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

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

iron tree: a small slow-growing deciduous tree of northern Iran having a low domed shape
flowering tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of iron tree include angiospermous tree.

iron tree (noun)	flowering tree (noun)
a small slow-growing deciduous tree of northern Iran having a low domed shape	any tree having seeds and ovules contained in the ovary