Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prĕcātor, ōris, m. [precor], one who prays or entreats, an intercessor (ante-class.): precator et patronus, Plaut. Ps. 2, 2, 12; id. As. 2, 4, 9; Ter. Heaut. 5, 2, 23: ad precatorem adeam, id. Phorm. 1, 2, 90.