- kingpin, top banana, bigwig - the most important person in a group or undertaking
--1 is a kind of important person, influential person, personage
- kingbolt, kingpin, swivel pin - bolt that provides a steering joint in a motor vehicle
--2 is a kind of bolt
- headpin, kingpin - the front bowling pin in the triangular arrangement of ten pins
--3 is a kind of bowling pin, pin