nouns
a rapid mover; someone who scrambles
"their quarterback was a good scrambler"; "scramblers can often unnerve a better tennis player"
is a type of (narrower)
someone who moves
a lightweight motorcycle equipped with rugged tires and suspension; an off-road motorcycle designed for riding cross country or over unpaved ground
electronic equipment that makes speech unintelligible during transmission and restores it at reception
is a type of (narrower)
equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)