Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vītĭ-sător, ōris, m. [vitis-sero], a vineplanter: Sabinus, Verg. A. 7, 179.
Of Bacchus, Att. ap. Macr. S. 6, 5.
Of Saturn, Arn. 3, 117.