evacuation vs voiding

evacuation and voiding both are nouns.

Word	Noun	Adjective	Verb	Adverb
evacuation	Yes	No	No	No
voiding	Yes	No	No	No

As nouns, evacuation and voiding are synonyms defined as:

Other synonyms of evacuation include elimination, excreting, excretion.

evacuation (noun)	voiding (noun)
the act of removing the contents of something	the bodily process of discharging waste matter
the act of evacuating; leaving a place in an orderly fashion; especially for protection
the bodily process of discharging waste matter