voiding vs excretion

voiding and excretion both are nouns.

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

As nouns, voiding and excretion are synonyms defined as:

Other synonyms of voiding include elimination, evacuation, excreting.

voiding (noun)	excretion (noun)
the bodily process of discharging waste matter	the bodily process of discharging waste matter
	waste matter (as urine or sweat but especially feces) discharged from the body