Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vīvĭfĭcātor, ōris, m. [vivifico], he who makes alive, a quickener, vivifier (eccl. Lat.), Tert. Res. Carn. 37 med.; id. adv. Marc. 2, 9; Aug. Civ. Dei, 7, 3.