outbreak

A sudden increase.

A sudden eruption; an outburst.

To break or burst forth.

A breaking out; an outburst; a sudden and violent manifestation: as, an outbreak of fever; an outbreak of popular indignation.

A rupture of the peace; a public disturbance or riot.

A bursting forth; eruption; insurrection; mutiny; revolt.

A sudden beginning of a violent event.

A sudden occurrence or manifestation; — usually of disease or emotion, in one person or a group.

An eruption, sudden appearance

A sudden increase.