Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ēreptor, ōris, m. [eripio], a robber, plunderer: bonorum, Cic. Quint. 8: libertatis, id. Sest. 51.
Plur.: terrarum, Tac. A. 13, 55 fin.