Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ămīsus, i, f., = Ἀμισός, a town in Pontus, now Samsoon, Cic. Imp. Pomp. 8; Plin. 37, 8, 37, § 115; Mel. 1, 19.—Ămīsum, i, n., Plin. 6, 2, 2, § 7. Cf. Mann. Asia Min. 2, 448 sq.—Ămīsēni, ōrum, m., the inhabitants of Amisus, Plin. Ep. 10, 93.