Can either be friendly, or a slight aggressive manner of speaking. Loud to ensure attention, but still with a sense of self-respect.
Aggressive, loud, and usually caused by anger.
The epitome. Loudest, and used either when horror-struck, in fear, anger or hatred. No sense of self-conscience is present anymore, just screaming in order to gain attention/message across.
Can also be a reflex act.
- One would not scream/yell above a crowd/over a distance to greet someone, but shout.
- One would not yell out of surprise, but shout/scream, the latter being an act of reflex.
- One would not yell/shout when one is attacked, but scream.
- One would not scream at someone for a minor act lacking discipline, but shout.