VHT
Very High Traction. A liquid that is typically sprayed on prepared asphalt surfaces to increase traction for on-road r/c cars (both foam and rubber tires). Must be reapplied often in order to maintain friction benefits and will often be reserved for organized racing events.
Volt
Also Voltage. The electrical force or potential difference of electrical energy. This is not to be confused with electrical energy knows as watts (amperes x volts).
V-Pattern
Refers to the "V" shaped treat pattern on the wheel. These typically are run on street sedans.