deadening vs stultification

deadening and stultification both are nouns.

Word	Noun	Adjective	Verb	Adverb
deadening	Yes	Yes	No	No
stultification	Yes	No	No	No

As nouns, deadening and stultification are synonyms defined as:

deadening and stultification: the act of making something futile and useless (as by routine)

Other synonyms of deadening include constipation, impairment.

deadening (noun)	stultification (noun)
the act of making something futile and useless (as by routine)	the act of making something futile and useless (as by routine)
	derision of someone or something as foolish or absurd or inconsistent

deadening (adjective)	stultification (adjective)
so lacking in interest as to cause mental weariness