Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. hortātor, ōris, m. [hortor], an inciter, encourager, exhorter (class.; cf.: monitor, impulsor, admonitor): cum ejus studii tibi et hortator et magister esset domi, Cic. de Or. 1, 55, 234: studiorum, Quint. 10, 3, 23: scelerum, Verg. A. 6, 529; Ov. M. 13, 45: isto hortatore, auctore, intercessore, Cic. Rosc. Am. 38, 110: hortatore non egetis, id. Phil. 11, 2, 3: hortatore bono, Enn. ap. Fest. p. 363 Müll. (Ann. v. 471 Vahl.): quasi in mari Solet hortator remiges hortarier, Plaut. Merc. 4, 2, 5; cf.: requiemque modumque Voce dabat remis, animorum hortator Epopeus, Ov. M. 3, 619.
2. Hortātor, ōris, m. [hortor], a Roman surname, Liv. 8, 15.