"kingpins" in the noun sense
1. kingpin, top banana, bigwig
the most important person in a group or undertaking
2. kingbolt, kingpin, swivel pin
bolt that provides a steering joint in a motor vehicle
3. headpin, kingpin
the front bowling pin in the triangular arrangement of ten pins
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License