eruption

noun4

1. •
   A violent ejection, such as the spurting out of lava from a volcano.
2. •
   A sudden release of pressure or tension.

   • There was an eruption of joy at the final whistle.
3. •
   An utterance, especially a sudden one; an ejaculation.
4. •
   An infection of the skin resulting in a rash or blemishing.