insurance, n. [assurance], [indemnity].
insure, v. assure, indemnify; [underwrite].
insurgency, n. [revolt], [rebellion], insubordination, [mutiny].
insurgent, a. [rebellious], [mutinous], insubordinate, insurrectionary.
insurgent, n. [rebel], [revolter], mutineer, insurrectionist.
intaglio, n. diaglyph. Antonym: [cameo].
intelligence, n. [knowledge], [discernment], [insight], [acumen].
intelligent, a. [clever], [discerning], astute, [bright], [knowing], [apt], [sensible].
intemperance, n. [excess], immoderation, [debauchery].
intemperate, a. [immoderate], [excessive], [unrestrained].