excrement vs excretion

excrement and excretion both are nouns.

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

As nouns, excrement and excretion are synonyms defined as:

excrement and excretion: waste matter (as urine or sweat but especially feces) discharged from the body

Other synonyms of excrement include body waste, excreta, excretory product.

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