Linchpin vs. Lynchpin — What's the Difference?

A linchpin, also spelled linch pin, lynchpin, or lynch pin, is a fastener used to prevent a wheel or other part from sliding off the axle upon which it is riding. The word is first attested in the late fourteenth century and derives from Middle English elements meaning "axletree pin".Securing implements onto the three-point hitch of a tractor is an example of application.

Variant of linchpin.

A person or thing vital to an enterprise or organization

A central cohesive source of support and stability;

A pin passed through the end of an axle to keep a wheel in position.

Pin inserted through an axletree to hold a wheel on

A locking pin inserted in the end of a shaft, as in an axle, to prevent a wheel from slipping off.

A central cohesive element

A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.

(figuratively) A central cohesive source of stability and security; a person or thing that is critical to a system or organisation.

(ambitransitive) To adopt as, or serve as, a central cohesive source of stability and security.

A pin used to prevent the wheel of a vehicle from sliding off the axletree.

A central cohesive source of support and stability;

Pin inserted through an axletree to hold a wheel on