body waste vs urine

body waste and urine both are nouns.

Word	Noun	Adjective	Verb	Adverb
body waste	Yes	No	No	No
urine	Yes	No	No	No

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

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

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