Synonyms for Groove (same or very similar meaning)
WordNet sense 1 (a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)):
channel
WordNet sense 2 ((anatomy) any furrow or channel on a bodily structure or part):
vallecula
WordNet sense 3 (hollow out in the form of a furrow or groove):
furrow, rut
From the ODE community, based on WordNet
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