Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Aspărāgĭum, ii, n., a town in Illyria, on the river Genusus, now Iskarpar, Caes. B. C. 3, 30 fin.; 3, 41; 3, 76.
† aspărăgus (asph-, App. Herb. 84), i, m., = ἀσπάραγος (ἀσφ-).