Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
innōmĭnābĭlis, e, adj. [2. in-nomino], that cannot be named, nameless (post-class.): indictus, innominabilis, App. Dogm. Plat. 1, p. 3, 30; Tert. adv. Val. 37 (dub.).