Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
agnōmĭnātĭo (adn-), ōnis, f., the bringing together two words different in meaning, but similar in sound, paronomasia, a rhet. fig., = παρονομασία: veniit a te antequam Romam venit. Hunc ăvium dulcedo ducit ad āvium. Si lenones tamquam leones vitāsset. Videte judices, utrum homini navo an vano credere malitis, etc., Auct. ad Her. 4, 21; cf. Quint. 9, 3, 66.