nod Synonyms

salutation tocsin vellication wave wink yawn yes zed inclination acknowledgement seal of approval handshake supination snore snooze salute sanction sandman semaphore senna shrug siesta sign signal sleep slumber bell buoy unlax nihil obstat nod off doze off fall asleep flake out niddle-noddle red light shake hands shut-eye shuteye say hello high-five curtsey body language affirmativeness drop off authentication all clear ok okay clean bill of health rubber stamp