A
alpha
beginning
belch
blast-off
blaze
burst
cascade
civil disorder
commencement
convulsion
creation
cutting edge
cyclone
dawn
debouchment
dissiliency
edge
emeute
eructation
eruption
establishment
explosion
fit
flare-up
flying start
foundation
fresh start
gale
general uprising
gush
gust
hurricane
institution
insurgence
insurgency
insurrection
irruption
jacquerie
jet
jump-off
kick-off
leading edge
levee en masse
mutiny
new departure
happening
natural event
occurrence
occurrent
epidemic
recrudescence
crisis
demonstration
disaster
disturbance
flood
frenzy
invasion
manifestation
outburst
spasm
surge
threat
tumult
violence