Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
reptĭlis, e, adj. [repo], creeping, reptile: cochleae, Sid. Ep. 3, 12.
Neutr. as subst.: reptĭle, is, a reptile, Vulg. Gen. 1, 24; id. Deut. 4, 18.