INLA uncommon noun 1. a radical terrorist group dedicated to the removal of British forces from Northern Ireland and the unification of Ireland SynonymsIrish National Liberation ArmyPeople's Liberation ArmyPeople's Republican ArmyCatholic Reaction Force Related words Word family inlayinlaidinlandinland billInland RevenueInland Sea Broader terms terrorist organization WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.