excretion vs excreting

excretion and excreting both are nouns.

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

As nouns, excretion and excreting are synonyms defined as:

Other synonyms of excretion include elimination, evacuation, voiding.

excretion (noun)	excreting (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