endorphin

[ US /ɛnˈdɔɹfɪn/ ]
[ UK /ɛndˈɔːfɪn/ ]

NOUN

a neurochemical occurring naturally in the brain and having analgesic properties

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How To Use endorphin In A Sentence

When Harry's turned on, his adrenaline flows and the endorphins pump, and he feels alive instead of dead.
Extra endorphins would help endurance athletes to hurdle the pain barrier. Times, Sunday Times
As you move around the rink, chemicals called endorphins will be released into your blood stream. The Sun
Maybe it's hormones or endorphins or something but it really did feel good. Times, Sunday Times
(Of course the endorphin rush from the large amount of caspaicin in the chili peppers didn't hurt either!) Archive 2008-04-01
Your endorphins don't really kick in until you've been exercising aerobically for 30 minutes.
Dance classes release endorphins and encourage interaction - and that social aspect keeps people coming back. Times, Sunday Times
It releases endorphins, natural feel-good chemicals that fight pain. The Sun
I feel it come loose and, giddy with adrenaline, endorphins, and joy, I bring my hands up to my face and start threading the laces out of my eyelids, wincing when they scratch my eyes.
When you push yourself, your body makes endorphins which give you a natural high.