Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† zēlus, i, m., = ζῆλος, zeal, emulation; jealousy, Vitr. 7 praef.; Prud. Ham. 188; Aus. Epigr. 77; Hier. in Gal. 2, 4, vv. 17, 18; Vulg. Num. 25, 11.