excreta vs urine

excreta and urine both are nouns.

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

As nouns, urine is a hyponym of excreta; that is, urine is a word with a more specific, narrower meaning than excreta:

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

excreta (noun)	urine (noun)
waste matter (as urine or sweat but especially feces) discharged from the body	liquid excretory product