Other hyponyms of happening include
accompaniment,
attendant,
co-occurrence,
concomitant,
avalanche,
experience,
trouble,
treat,
miracle,
marvel,
wonder,
thing,
episode,
contingence,
contingency,
eventuality,
beginning,
conclusion,
ending,
finish,
one-off,
periodic event,
recurrent event,
alteration,
change,
modification,
computer error,
error,
accident,
chance event,
fortuity,
stroke,
fire,
incident,
discharge,
case,
example,
instance,
motion,
movement,
failure,
success,
appearance,
destiny,
fate,
disappearance,
disappearance,
contact,
impinging,
striking,
finish,
collapse,
break,
interruption,
sound,
union,
news event,
flash,
convergence,
juncture,
occasion,
burst,
flare-up,
outburst,
eruption,
irruption,
outbreak,
blow,
reversal,
reverse,
setback,
bonanza,
boom,
bunce,
godsend,
gold rush,
gravy,
manna from heaven,
windfall,
collapse,
crash,
supervention.