Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
incĭtātor, ōris, m. [incito], an inciter, instigator (post-class.): Fauni vaticinantium incitatores, Front. Eloqu. med.; Prud. στεφ. 10, 67: male sanus, Amm. 28, 1.