Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dētractor, ōris, m. [detraho, no. II. B.], a disparager, detractor: sui, Tac. A. 11, 11 fin. (for which, detrectator laudum suarum, Liv. 34, 15 fin.): abominatio hominum detractor, Vulg. Prov. 24, 9 al.