Irruption

n.	1.
	1.	A bursting in; a sudden, violent rushing into a place; as, irruptions of the sea. Lest evil tidings, with too rude irruption Hitting thy aged ear, should pierce too deep. - Milton.
	2.	A sudden and violent inroad, or entrance of invaders; as, the irruptions of the Goths into Italy.

Noun	1.	irruption - a sudden violent entrance; a bursting in; "the recent irruption of bad manners"
	2.	irruption - a sudden sharp increase in the relative numbers of a population
	3.	irruption - a sudden violent spontaneous occurrence (usually of some undesirable condition); "the outbreak of hostilities" Synonyms: outbreak, eruption

air attack, air raid, air strike, blaze, boarding, burst, convulsion, cyclone, encroachment, entrance, entrenchment, eruption, escalade, explosion, fire raid, fit, flare-up, foray, gale, gust, hurricane, impingement, imposition, incursion, infiltration, influx, infringement, injection, inroad, insinuation, interference, interjection, interloping, interposition, interposure, interruption, intervention, intrusion, invasion, obtrusion, outbreak, outburst, paroxysm, raid, razzia, saturation raid, scaling, seizure, shuttle raid, spasm, storm, tempest, tornado, trespass, trespassing, unlawful entry, upheaval, whirlwind