Pivot
Part of speech: verb
Definition: To turn on an exact spot.
Part of speech: noun
Definition: A thing on which something turns; specifically a metal pointed pin or short shaft in machinery, such as the end of an axle or spindle. Something or someone having a paramount significance in a certain situation. Act of turning on one foot.
Swivel
Part of speech: noun
Definition: (mechanical): A piece, as a ring or hook, attached to another piece by a pin, in such a manner as to permit rotation about the pin as an axis.A small piece of ordnance, turning on a point or swivel; -- called also swivel gun.strength of mind or character that enables one to overcome adversity; confidence; will
Part of speech: verb
Definition: To swing or turn, as on a pin or pivot.