"birches" in the noun sense
1. birch
hard close-grained wood of any of various birch trees used especially in furniture and interior finishes and plywood
2. birch, birch tree
any betulaceous tree or shrub of the genus Betula having a thin peeling bark
3. birch, birch rod
a switch consisting of a twig or a bundle of twigs from a birch tree used to hit people as punishment
"my father never spared the birch"
"birches" in the verb sense
1. birch
whip with a birch twig
Source: WordNet® (An amazing lexical database of English)
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