Similar word to security:

aegis, agreement, armament, armor, asylum, bail, bond, care, collateral, compact, contract, covenant, cover, custody, defense, earnest, freedom, guarantee, guard, immunity, insurance, pact, pawn, pledge, precaution, preservation, promise, redemption, refuge, retreat, safeguard, safekeeping, safeness, safety measure, salvation, sanctuary, shelter, shield, surety, surveillance, token, ward, warrant