operetta /o-pə-retˈə/

1. A short, light, often rather trivial, musical drama
2. Often, esp formerly, light opera (see under opera¹)

• petrol
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• petrol blue
• petrol bomb
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• petroleous
• petroleum
• petroleum coke
• petroleum ether
• petroleum jellies
• petroleum jelly
• petroleums
• petrolhead
• petrolheads
• petrolic
• petroliferous
• petrolled
• petrol lighter
• petrol lighters
• petrolling
• pretendedly
• pretendent