horripilation (goose-flesh; goose-bumps)
micturition (peeing)
singultus (hiccups)
onychophagia (nailbiting)
sternutation (sneezing)
nictitation (blinking)
oscitancy [?] (yawning)
stertoration (snoring)
mastication (chewing)
deglutition (swallowing)
emesis (vomiting)
ambulation (walking)
respiration (breathing)
expectorate (spit)
borborygmus (a tummy rumble)
eructation (burbing)
flatulation (farting)
coitus reservatus (you know)
coitus interruptus (ditto)
lacrymation (crying)
ingestation (eating)
somnambulation (sleep walking)
somniloquize (sleep talk)
tussis (cough)

any more?