Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cantātor, ōris, m. [canto; lit. a singing, a playing; hence, abstr. pro concr.], a musician, singer, minstrel (mentioned by Varr. L. L. 8, § 57 Müll.): vetus et nobilior Ario cantator fidibus fuit, Gell. 16, 19 (transl. of the Gr. κιθαρὡδός, Herod. 1, 23 Bähr): cantator cygnus funeris ipse sui, Mart. 13, 77.