Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. nōmĭnātus, ūs, m. [nomino], a naming, a name; in gram., a noun (perh. only in Varr.), Varr. L. L. 8, § 52 Müll.; so id. ib. § 63: quod ad nominatuum analogiam pertinet, id. ib. 9, 52, § 95; id. ib. 10, 1.