Grabbing some z's is a common slang term used to denote the act of sleeping. However, there are several other synonyms you could use to convey the same meaning. These include dozing off, catching some shut-eye, hitting the hay, snoozing, napping, taking a nap, slumbering, dozing, resting, and catching some winks. These synonyms not only provide an alternative way to describe the act of sleeping but also offer variation to your writing. So next time when you feel the urge to take a nap on a lazy afternoon, remember that you have more than one synonym to describe your activity.