iron-tree vs iron tree

iron-tree and iron tree both are nouns.

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

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

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

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

iron-tree (noun)	iron 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