Supercharged
An engine with a belt-driven compressor forcing in extra air for immediate power.
A supercharger is a compressor driven directly by the engine, usually by a belt, that forces extra air into the cylinders. Because it is mechanically linked to the engine, the extra power arrives instantly with no lag.
The cost of that immediacy is efficiency: the engine spends some of its own power spinning the compressor. Superchargers are mostly found on performance cars and trucks where instant response matters more than fuel economy.
From the data: Of the 19,491 trims in the Trimslate dataset, 543 are supercharged.