Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ăbyla, ae, f., = Ἀβύλη, a spur of a mountain in Africa, on the strait of Gibraltar, one of the Pillars of Hercules, opposite Calpe, Mel. 15, 3; Avien. Perieg. 111.