iron-tree vs ironwood tree

iron-tree and ironwood tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
iron-tree	Yes	No	No	No
ironwood tree	Yes	No	No	No

As nouns, iron-tree and ironwood tree are synonyms defined as:

iron-tree and ironwood tree: a small slow-growing deciduous tree of northern Iran having a low domed shape

Other synonyms of iron-tree include iron tree, ironwood.

iron-tree (noun)	ironwood tree (noun)
a small slow-growing deciduous tree of northern Iran having a low domed shape	a small slow-growing deciduous tree of northern Iran having a low domed shape
	medium-sized hop hornbeam of eastern North America
	handsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfume; source of very heavy hardwood used for railroad ties