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,
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,
black eye,
blow,
reversal,
reverse,
setback,
bonanza,
boom,
bunce,
godsend,
gold rush,
gravy,
manna from heaven,
windfall,
collapse,
crash,
supervention.