ironwood tree

definition: medium-sized hop hornbeam of eastern North America
example:
speech part: noun
synonyms: ironwood
definition: a small slow-growing deciduous tree of northern Iran having a low domed shape
example:
speech part: noun
synonyms: ironwood
definition: handsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfume
example:
speech part: noun
synonyms: ironwood

How ironwood tree is being used?