Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ōsor (ossor, Plaut. l. l. infra), ōris, m. [odi], a hater (ante- and post-class.): uxoris suae ossor, Plaut. As. 5, 2, 9 Fleck. (Ussing, osor): hominum, App. de Deo Socr. p. 48, 15; Pacat. Pan. Th. 20, 5; Aus. Ep. 4, 24: mulierum, Plaut. Poen. prol. 74; cf.: osorem dixerunt, qui aliquem odisset, Paul. ex Fest. p. 196 Müll.