quid pro quo /kwid prō kwō/

1. Something given or taken as equivalent to another, often as retaliation or in return for a previous favour
2. The action or fact of giving or receiving thus

• toothbrush moustaches
• toothcomb
• toothcombs
• tooth-drawer
• tooth-drawers
• tooth-drawing
• toothed
• toothed whale
• toothed whales
• tooth fairies
• tooth fairy
• toothfish
• toothfishes
• toothful
• toothfuls
• toothier
• toothiest
• toothily
• toothiness
• toothinesses
• toothing
• toothless
• toothlike
• tooth-ornament
• tooth-ornaments