Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cānăba (or cannăba), ae, f. [kindr. with κάναβος and κάννα; acc. to others, with καλύβη], a hovel, hut, Aug. Serm. 61, de Temp.; Inscr. Orell. 39; 4077.