Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
suffīmentum, i, n. [suffio], fumigation, incense (cf.: odor, fragrantia): in iis sine illius suffimentis expiati sumus, Cic. Leg. 1, 14, 40: quia suffimentum sit (laurus) caedis hostium et purgatio, Plin. 15, 30, 40, § 135; cf. Fest. pp. 348 and 349 Müll.
Plur., Veg. Vet. 1, 19 sq.; 4, 12.