Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
omnĭtŭens, entis, adj. [omnis-tueor], all-seeing (poet. and in post-class. prose), Lucr. 2, 942; Val. Fl. 5, 247: sol, App. Mundo, p. 71, 23.