Hegira

(n.) The flight of Mohammed from Mecca, September 13, A. D. 622 (subsequently established as the first year of the Moslem era); hence, any flight or exodus regarded as like that of Mohammed.

Thesaurus Entries

AWOL, French leave, abandonment, absence without leave, absquatulation, bolt, decampment, departure, desertion, disappearance, disappearing act, egress, elopement, escape, evacuation, exit, exodus, flight, fugitation, getaway, going, hasty retreat, leaving, parting, passing, quick exit, removal, retirement, retreat, running away, scramming, skedaddle, skedaddling, walkout, withdrawal