The crossword solutions for the term GREETS SILENTLY are NODS (4 letters) and NODSAT (6 letters). NODS is an informal gesture of greeting, agreement, or acknowledgement made by nodding one's head. NODSAT is an acronym for 'nod silently at', which is a more formal way of greeting someone without speaking. Both terms refer to a silent form of greeting, which is often used in situations where speaking is not appropriate or allowed.