excretion vs excretory product

excretion and excretory product both are nouns.

Word	Noun	Adjective	Verb	Adverb
excretion	Yes	No	No	No
excretory product	Yes	No	No	No

As nouns, excretion and excretory product are synonyms defined as:

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

Other synonyms of excretion include body waste, excrement, excreta.

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