I want a word to refer to words and names collectively,
and a word to refer to peeing and pooping collectively (not "relieving yourself" since that is disgusting)
A word for words and names? Nomenclature, terminology, lexicon...
A word for peeing and pooping collectively? Most words have other uses, but also pertain to both bathroom activities, like Excretion, evacuation, expulsion, waste, elimination... There are better words that specifically refer to each act individually, but not collectively. Just for peeing there's urinate and micturate, and just for pooping there's defecate.