Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dēpĕcūlātor, ōris, m. [depeculor], a plunderer, embezzler: aerarii, Cic. Verr. 1, 1, 2; id. de Or. 3, 27, 106; id. Pis. 40, 96.