is a specific kind of: ejection, expulsion, forcing out, projection | inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex.

is a broader term that covers: rumination | haematemesis, hematemesis | hyperemesis.

derivation: barf, be sick, cast, cat, chuck, disgorge, honk, puke, purge, regorge, regurgitate, retch, sick, spew, spue, throw up, upchuck, vomit, vomit up.