Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ventŭlus, i, m. dim. [ventus], a slight wind, breeze (ante-class.): ventulum facere, to make a breeze (by fanning), Ter. Eun. 3, 5, 47; Plaut. Curc. 2, 3, 37; id. Cas. 3, 5, 14.