buildup vs deposition

buildup and deposition both are nouns.

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

As nouns, deposition is a hyponym of buildup; that is, deposition is a word with a more specific, narrower meaning than buildup:

Other hyponyms of buildup include deposit.

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