CHANGEFUL
Change"ful, a.

Defn: Full of change; mutable; inconstant; fickle; uncertain. Pope.
His course had been changeful. Motley.
— Change"ful*ly, adv.
— Change"ful*ness, n.

CHANGE GEAR
Change gear. (Mach.)

Defn: A gear by means of which the speed of machinery or of a vehicle may be changed while that of the propelling engine or motor remains constant; — called also change-speed gear.

CHANGE KEY
Change key.

Defn: A key adapted to open only one of a set of locks; — distinguished from a master key.

CHANGELESS
Change"less, a.

Defn: That can not be changed; constant; as, a changeless purpose.
— Change"less*ness, n.

CHANGELING
Change"ling, n. Etym: [Change + -ling.]

1. One who, or that which, is left or taken in the place of another, as a child exchanged by fairies. Such, men do changelings call, so changed by fairies' theft. Spenser. The changeling