1. (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition)

• eruption
• outbreak

1. (noun) a sudden violent entrance; a bursting in

• entering
• entrance
• entry
• incoming
• ingress

2. (noun) a sudden sharp increase in the relative numbers of a population

• population growth

3. (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition)

• happening
• natural event
• occurrence
• occurrent

1. (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition)

• epidemic
• recrudescence

1. (noun) a sudden violent entrance; a bursting in

• intrude
• irrupt

2. (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition)

• break open
• break open
• burst out
• burst out
• erupt
• erupt
• flare
• flare
• flare up
• flare up
• irrupt
• irrupt