practitioner /prak-tishˈə-nər/

1. Someone who is in practice, esp in medicine
2. Someone who practises or goes in for something specified

• what an if
• what are you doing with
• what a vengeance
• what cheer
• what do you know
• what do you say to
• what-d'you-call-'em
• what-d'you-call-it
• whate'er
• what else
• whaten
• whatever
• whatevs
• what for
• what for a
• what gives
• what have you
• what ho
• what if
• what is he for a man
• what-like
• Whatman paper
• what matter if
• whatna
• whatness