accessary
accessory
accidental
addendum
addition
adjunct
adventure
appendage
appurtenance
attribute
auxiliary
befalling
blow
blunder
calamity
casualty
cataclysm
catastrophe
chance
chance hit
collateral
collision
coming to be
contingency
contingent
contretemps
crack-up
crash
destiny
disaster
event
eventuality
eventuation
extra
fate
fluke
fortuity
fortune
freak accident
grief
hap
happening
happenstance
hazard
ill hap
incidence
incidental
attack
circumstance
crime
danger
difficulty
failure
illness
incident
injury
misfortune
mistake
occurrence