Synonyms for Pee (same or very similar meaning)
WordNet sense 1 (liquid excretory product):
piddle, piss, urine, water, weeweeWordNet sense 2 (informal terms for urination):
peeing, pissingWordNet sense 3 (eliminate urine):
make, puddle, urinate, wee, micturate, pee-pee, wee-wee, make water, pass water, relieve oneself, spend a penny, take a leakFrom the ODE community, based on WordNetadd/edit