Related Clues:

• Cheers
• Gives a hoot
• Argues vehemently
• Screams
• 'Go, team, go!' and others
• Cheerleaders' practice
• Cries
• Attention getters
• Whoops
• Makes sure one is heard, maybe
• Shouts
• Makes oneself heard
• Tries to reach the hard of hearing
• Blasts out
• Long-distance calls?