Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sĭmĭla, ae, f. [root si, to sift; cf. Gr. ἱμαλιά; Germ. Semmel], the finest wheat flour, Cels. 2, 18 med.; 2, 30; Mart. 13, 10 in lemm.; Hier. Ep. 52, 6; 54, 11.
Called also, sĭmĭlāgo, Plin. 18, 10, 20, § 89; Ambros. in Luc. 8, § 49; Vulg. Num. 7, 13 et saep.
Stĭmŭla (Sĭmĭla, Liv. 39, 12), ae, f. [stimulus], the goddess who pricks on, excites, stimulates to action or pleasure, Aug. Civ Del, 4, 11; 4, 16; perh. for Semele, Ov. F. 6, 503; Schol. Juv. 2, 3; cf. Müller, Etrusk. 2, 77.