nodat
- Signal with one's head
- Signal silently to
- Say yes to without saying "yes"
- Say 'yes' to silently
- Relay a bid, as to an auctioneer
- Indicate wordlessly
- Indicate agreement with
- Greet without words
- Greet subtly
- Greet simply
- Agree with silently
- Acknowledge wordlessly
- Acknowledge surreptitiously, maybe
- Acknowledge in passing
- Acknowledge from afar
- Acknowledge from across the room