Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ĕbŭlum, i, n., and ĕbŭlus, i, m., Dane-wort, dwarf-elder: Sambucus ebulus, Linn.; Cato R. R. 37, 2; Plin. 26, 11, 73, § 119 sq.; Verg. E. 10, 27; Col. poët. 10, 10 al.