Barrel roll and Vat

Barrel roll noun - A roll in which the plane follows a spiral course.

Vat and barrel roll are semantically related. In some cases you can use "Vat" instead a noun phrase "Barrel roll".

Vat noun - A tax levied on the difference between a commodity's price before taxes and its cost of production.

Barrel roll and vat are semantically related. You can use "Barrel roll" instead a noun "Vat".