Linchpin keystone Synonyms

Definitions for Linchpin

(noun) a central cohesive source of support and stability
(noun) pin inserted through an axletree to hold a wheel on

Synonyms for phrase

essential principle

essential heart

LK abbreviation

LK is an abbreviation for Linchpin Keystone

What does LK stand for?

LK stands for "Linchpin Keystone"

Definitions for Keystone

(noun) an immaterial thing upon which something else rests
(noun) the central building block at the top of an arch or vault
(noun) a central cohesive source of support and stability