Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Tĕtrĭca, ae, f., a rocky mountain in the Sabine territory, abounding in wild goats, Varr. R. R. 2, 1, 5; Verg. A. 7, 713; called Tetrica rupes, Sil. 8, 419.