| eastern hop hornbeam | (n) medium-sized hop hornbeam of eastern North America, Syn. ironwood tree, ironwood, Ostrya virginiana |
| iron tree | (n) a small slow-growing deciduous tree of northern Iran having a low domed shape, Syn. ironwood tree, iron-tree, ironwood |
| rose chestnut | (n) 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, Syn. ironwood tree, Mesua ferrea, ironwood |