Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Butuntum, i, n., a town of Calabria, now Bitonte; hence, Butuntinenses, ĭum, m., the inhabitants of Butuntum, Plin. 3, 11, 16, § 105; Front. Col. p. 111.