Noun: upswell- A sudden or abrupt strong increase
"stimulated an upswell of speculation";
- surge, upsurge, insurgence
- A sudden, often forceful flow
"An upswell of magma caused the volcano to erupt violently";
- rush, spate, surge, upsurge, tide
Derived forms: upswells
Type of: flow, flowing, increase, step-up