Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nĕrētum, i, n., a city in Calabria, now Nardo, Ov. M. 15, 51.
Hence, Nĕrē-tīni, ōrum, m., the inhabitants of Neretum, Plin. 3, 11, 16, § 105.