Merriam-Webster Online Dictionary
accident (noun)1.
a) an unforeseen and unplanned event or circumstance
b) lack of intention or necessity - chance met by accident rather than by design
2.
a) an unfortunate event resulting especially from carelessness or ignorance
b) an unexpected and medically important bodily event especially when injurious - a cerebrovascular accident
c) an unexpected happening causing loss or injury which is not due to any fault or misconduct on the part of the person injured but for which legal relief may be sought
d) - used euphemistically to refer to an involuntary act or instance of urination or defecation
3.
a nonessential property or quality of an entity or circumstance - the accident of nationality
Merriam-Webster Online Thesaurus
accident (noun)1.
a chance and usually sudden event bringing loss or injury
SYNONIMS:
casualty, mischance, mishapRELATED WORDS:
calamity, cataclysm, catastrophe, cropper, deathblow, disaster, tragedy; bummer, knock, misadventure, misfortune; collision, crack-up, crash, smashup, wreckNEAR ANTONYMS:
boon, break, fluke, godsend, miracle, strike, windfall; fortune, luck, serendipity2.
the uncertain course of events
SYNONIMS:
accident, casualty, circumstance, hap, hazard, luckRELATED WORDS:
fortuitousness, fortuity, haphazardry, randomness, uncertainty; fluke, happenchance, happenstance; destiny, doom, fate, fortune, lot; danger, peril, riskNEAR ANTONYMS:
intent, intention, purpose; design, outline, plan, scheme