deposition vs buildup

deposition and buildup both are nouns.

Word	Noun	Adjective	Verb	Adverb
deposition	Yes	No	No	No
buildup	Yes	No	No	No

As nouns, buildup is a hypernym of deposition; that is, buildup is a word with a broader meaning than deposition:

deposition (noun)	buildup (noun)
the act of deposing someone; removing a powerful person from a position or office	the act of building up an accumulation
the act of putting something somewhere	highly favorable publicity and praise
(law) a pretrial interrogation of a witness; usually conducted in a lawyer's office	the result of the process of accumulation
the natural process of laying down a deposit of something