Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ămānus, i, m., = Ἀμανός, a mountain range,running from N.E. to S. W.,between Syria and Cilicia, now Jawur Dagh;Ămā-nĭcae pylae,the passes of Amanus,Cic. Att. 5, 20;id. Fam. 2, 10;Plin. 5, 22, 18, § 80;Luc. 3, 244 al.