Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
răpācĭtas, ātis, f. [rapax], greediness, rapacity: quis in rapacitate avarior, Cic. Cael. 6, 13; Suet. Tit. 7; Just. 38, 7, 8; Mart. 6, 72, 1: dirae filius es rapacitatis, id. 12, 53, 7.