Open English Wordnet
Nouns
(n)sweet birch, cherry birch, black birch, Betula lentacommon birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture
(n)black birch, river birch, red birch, Betula nigrabirch of swamps and river bottoms throughout the eastern United States having reddish-brown bark