Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
exōrābŭla, ōrum, n. [exoro], means of entreating or convincing, enticements, arguments (ante- and post-class.): quotque exoretur exorabulis, Plaut. Truc. 1, 1, 6: judicantium, App. Flor. p. 360.