Eruption vs. Irruption

Eruptionnoun

A violent ejection, such as the spurting out of lava from a volcano.

Irruptionnoun

The action of irrupting or breaking into; a violent entry or invasion; an inbreaking; an intrusion.

‘The Trojan irruption into the Greek camp is related in Book XV of the Iliad.’;

Eruptionnoun

A sudden release of pressure or tension.

‘There was an eruption of joy at the final whistle.’;

Irruptionnoun

(ecology) An abrupt increase of an animal population.

‘Extreme rainfall events predict irruptions of rat plagues in central Australia.’;

Eruptionnoun

An infection of the skin resulting in a rash or blemishing.

Irruptionnoun

(by extension) An abrupt increase in the size of a movement or organization.

‘How can we explain this irruption of young people self-identifying as socialists?’;

Eruptionnoun

The act of breaking out or bursting forth;

‘All Paris was quiet . . . to gather fresh strength for the next day's eruption.’;

Irruptionnoun

A bursting in; a sudden, violent rushing into a place; as, irruptions of the sea.

‘Lest evil tidings, with too rude irruptionHitting thy aged ear, should pierce too deep.’;

Eruptionnoun

That which bursts forth.

Irruptionnoun

A sudden and violent inroad, or entrance of invaders; as, the irruptions of the Goths into Italy.

Eruptionnoun

A violent exclamation; ejaculation.

‘He would . . . break out into bitter and passionate eruditions.’;

Irruptionnoun

a sudden violent entrance; a bursting in;

‘the recent irruption of bad manners’;

Eruptionnoun

The breaking out of pimples, or an efflorescence, as in measles, scarlatina, etc.

Irruptionnoun

a sudden sharp increase in the relative numbers of a population

Eruptionnoun

the sudden occurrence of a violent discharge of steam and volcanic material

Irruptionnoun

a sudden violent spontaneous occurrence (usually of some undesirable condition);

‘the outbreak of hostilities’;

Eruptionnoun

symptom consisting of a breaking out and becoming visible

Eruptionnoun

(of volcanos) pouring out fumes or lava (or a deposit so formed)

Eruptionnoun

a sudden violent spontaneous occurrence (usually of some undesirable condition);

‘the outbreak of hostilities’;

Eruptionnoun

a sudden very loud noise

Eruptionnoun

the emergence of a tooth as it breaks through the gum