oarlock

n (US) = rowlock.

nymphet, nympho, nymphomania, nymphomaniac, o, O level, o', o'clock, o'er, O, o, O, oh, O.K., oaf, oafish, oak, oak-apple, oaken, OAP, oar, oarfish, oarsman, OAS, oasis, oast, oasthouse, oat, oatcake, oath, oatmeal, oats, OAU, ob, obbligato, obbr.(=Music TV), obduracy, obdurate, OBE, obedience, obedient, obediently,