ironwood

(noun) 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. Synonyms: rose chestnut, ironwood tree, Mesua ferrea.

(noun) exceptionally tough or hard wood of any of a number of ironwood trees.

(noun) a small slow-growing deciduous tree of northern Iran having a low domed shape. Synonyms: iron tree, iron-tree, ironwood tree.

(noun) medium-sized hop hornbeam of eastern North America. Synonyms: Eastern hop hornbeam, ironwood tree, Ostrya virginiana.