is a specific kind of: egest, eliminate, excrete, pass.

is a broader term that covers: wet | stale.

verb group: urinate | ca-ca, crap, defecate, make, shit, stool, take a crap, take a shit.

derivation: pisser, urinator | micturition, urination | pee, peeing, piss, pissing | pee, piddle, piss, urine, water, weewee.