Yawns (5 letters) and NODS (4 letters) are both physical signs that can indicate boredom. Yawning is an involuntary reflex that is often associated with tiredness, but it can also be a sign of boredom. Nodding is a gesture of agreement or understanding, but it can also be used to show that someone is not interested in what is being said. Both of these behaviors can be seen as a sign of disinterest or lack of enthusiasm.