lynchpin vs linchpin

lynchpin and linchpin both are nouns.

Word	Noun	Adjective	Verb	Adverb
lynchpin	Yes	No	No	No
linchpin	Yes	No	No	No

As nouns, lynchpin and linchpin are synonyms defined as:

lynchpin and linchpin: pin inserted through an axletree to hold a wheel on

As nouns, lynchpin and linchpin are synonyms defined as:

lynchpin and linchpin: a central cohesive source of support and stability

Other synonyms of lynchpin include anchor, backbone, keystone, mainstay.

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