evacuation vs urination

evacuation and urination both are nouns.

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

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

Other hyponyms of evacuation include defecation, laxation, shitting, incontinence, incontinency, micturition.

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