Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† naulum (naulŏn), i, n., = ναῦλον, passage-money, fare: perdere naulon, Juv. 8, 97: in naulis navium, Dig. 30, 39, 1: ut naulum exsolvatur, ib. 20, 4, 6; Vulg. Jonae, 1, 3.