beat, burn out, carry too far, debilitate, do in, do up, enervate, exaggerate, exhaust, fag, fag out, fatigue, flag, frazzle, go overboard, go to extremes, go too far, harass, haul, heave, inflate, jade, knock out, knock up, know no bounds, overact, overcarry, overdevelop, overdistend, overdo, overdraw, overdrive, overelaborate, overemphasize, overexercise, overexert, overexpand, overexpend, overextend, overfatigue, overindulge, overlabor, overplay, overreact, overspend, overstress, overstretch, overstudy, overtask, overtax, overtire, overtrain, overuse, overweary, overwork, pass all bounds, poop, poop out, press, prostrate, protest too much, pull, rack, strain, strain every nerve, stress, stretch, sweat blood, swell, tax, tense, tire, tire out, tire to death, tucker, tug, use up, weaken, wear on, wear out, weary, wilt, wind

top

ROGET THESAURUS

overstrain

Fatigue

VB be fatigued, yawn, droop, sink, flag, lose breath, lose wind, gasp, pant, puff, blow, drop, swoon, faint, succumb, fatigue, tire, weary, irk, flag, jade, harass, exhaust, knock up, wear out, prostrate, tax, task, strain, overtask, overwork, overburden, overtax, overstrain.

Overestimation

VB overestimate, overrate, overvalue, overprize, overweigh, overreckon, overstrain, overpraise, eulogize, estimate too highly, attach too much importance to, make mountains of molehills, catch at straws, strain, magnify, exaggerate, set too high a value upon, think much of, make much of, think too much of, make too much of, outreckon, panegyrize, extol, extol to the skies, make the most of, make the best of, make the worst of, make two bites of a cherry, have too high an opinion of oneself.

For further exploring for "overstrain" in Webster Dictionary Online