excreta vs excrement

excreta and excrement both are nouns.

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

As nouns, excreta and excrement are synonyms defined as:

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

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

excreta (noun)	excrement (noun)
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