Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pācātor, ōris, m. [2. paco], a peace-maker, pacificator, subjugator (post-Aug.): gentium, Sen. Ben. 5, 15, 6: terrarum, id. ib. 1, 13, 3: orbis, id. Herc. Oet. 1990: terrae Iberae, Sil. 16, 246: Nemeae, id. 2, 483: Rheni, Claud. Laud. Stil. 3, 13: orbis, Num. ap. Eckh. D. N. 7, p. 190.