adrenaline, endorphins, exhilaration, excitement, thrill, emotion, testosterone, nerves, tranquillizer, euphoria, physical exertion, caffeine, nitrous, oxygen, novocaine, tingle, hormones, exertion, goose pimple, cortisone, intoxicating, noradrenaline, aggro, goosebumps, instinct, intensity, elation, goose bumps, goosebump, anxiety, parasympathetic nervous system, chills, tenseness, dizzy, palpitation, stamina, feeling, ecstasy, ecstacy, dopamine, heartbeat, manic, joy, pulsating, adrenals, razzmatazz, goose pimples, caffiene, frisson, endurance, lactic acid, reflex, throttle, gut, throbbing, tiredness, epinephrine, exultation, morphine, libido, enthusiasm, kinetic energy, spontaneity, exuberance, overspin, quivers, chirpiness, aliveness, wooziness, gooseflesh, hwyl, sweating, numbing, whoosh, giddiness, goose bump, narcosis, bloodstream, cortisol, dread, shivers, bravado, tastebud, delirium, fright, spume, serotonin, overexcitement, overdrive, anxiousness, sedates, stomach, roar, feverishness, glycogen, fidgetiness, suspense, umph, electrolytes, tranquilizer, joyousness, perspiration, histamine, progesterone, alkali, estrogen, glucocorticoids, oestrogen, thyroxine, acetylcholine, androgen, androgens, fat, insulin, opiate, radium, nitrate, procaine, bicarbonate, carbonate, electrolyte, equimolar, iodine, norepinephrine, oleic, potassium, quinine, surfactant, vitamin, adenine, aluminium

adrenaline, epinephrin, epinephrine

hormone, internal secretion