WordNet sense 1 (a militant organization of Irish nationalists who used terrorism and guerilla warfare in an effort to drive British forces from Northern Ireland and achieve a united independent Ireland):

Provos, Irish Republican Army, Provisional IRA, Provisional Irish Republican Army

WordNet sense 2 (a retirement plan that allows you to contribute a limited yearly sum toward your retirement; taxes on the interest earned in the account are deferred):

individual retirement account

WordNet sense 3 (belligerence aroused by a real or supposed wrong (personified as one of the deadly sins)):

anger, ire, wrath