linchpin [noun]

Definition of linchpin:

pin inserted through an axletree to hold a wheel on

Synonyms of linchpin:

● Lynchpin

● Anchor

● Mainstay

● Keystone

● Backbone

● Cornerstone

● Basis

● Foundation

● Spine


Opposite/Antonyms of linchpin:

● Accessory


Sentence/Example of linchpin:

The linchpin of my argument is the distinction between absolutism, relativism, and pluralism.