linchpin vs anchor

linchpin and anchor both are nouns.

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

As nouns, linchpin and anchor are synonyms defined as:

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

linchpin (noun)	anchor (noun)
pin inserted through an axletree to hold a wheel on	a mechanical device that prevents a vessel from moving
a central cohesive source of support and stability	a central cohesive source of support and stability
	a television reporter who coordinates a broadcast to which several correspondents contribute

linchpin (verb)	anchor (verb)
	secure a vessel with an anchor
	fix firmly and stably