Outbursts, noun plural of outburst. Synonyms in the same form.
Flare-up
flare-ups, explosions, bursts, eruptions, paroxysms, blowouts, blazes, blasts, gusts, fits, accesses, discharges
Blowup
blowups, effusions, gushes, ebullitions
Upheaval
upheavals
Other
outbreaks, pandemoniums, spates
All synonyms for outburst →