defusing vs deactivation

defusing and deactivation both are nouns.

Word	Noun	Adjective	Verb	Adverb
defusing	Yes	No	No	No
deactivation	Yes	No	No	No

As nouns, defusing and deactivation are synonyms defined as:

defusing and deactivation: the act of deactivating or making ineffective (as a bomb)

defusing (noun)	deactivation (noun)
the act of deactivating or making ineffective (as a bomb)	the act of deactivating or making ineffective (as a bomb)
	breaking up a military unit (by transfers or discharges)