Another word for overdo
To do too much
magnify, pile up, pile on, amplify, overestimate, overreach, stretch, overvalue, go too far, carry too far, overplay, overrate, exaggerate, hyperbolize, go to extremes, overstate, enlarge, enhance, exalt, bite off more than one can chew*, run into the ground*, do to death*, go overboard*, butter one's bread on both sides*, carry coals to Newcastle*, burn the candle at both ends*, lay it on*, have too many irons in the fire*, have one's cake and eat it too*; see also exceed.
Antonyms neglect*, underdo, slack.
To overtax oneself physically