Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
unguentum, i (gen. plur. unguentūm, Plaut. Curc. 1, 2, 5; id. Poen. 3, 3, 88), n. [unguo], an ointment, unguent, perfume: non omnes possunt olere unguenta exotica, Plaut. Most. 1, 1, 41; 1, 3, 115 sq.; Cic. Verr. 2, 3, 25, § 62; id. Cat. 2, 3, 5; id. Sest. 8, 18; id. Cael. 11, 27; id. Tusc. 5, 21, 62; Hor. C. 2, 3, 13; 2, 7, 23; id. A. P. 375; Prop. 3, 16 (4, 15), 23; Ov. F. 3, 561; Mart. 11, 54, 1; Plin. 1, 1, 1, § 3.