anchor vs linchpin

anchor and linchpin both are nouns.

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

As nouns, anchor and linchpin are synonyms defined as:

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

anchor (noun)	linchpin (noun)
a mechanical device that prevents a vessel from moving	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
a television reporter who coordinates a broadcast to which several correspondents contribute

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