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.

intend, v. design, purpose, propose, contemplate, plan.

intended, n. fiance (male), fiancee (female).

intense, a. extreme, excruciating.

intensify, v. aggravate, exacerbate, heighten.

intention, n. design, plan, purpose, aim.

intentional, a. deliberate, premeditated.  Antonyms:  unintentional, inadvertent, accidental.

intercede, v. mediate, interpose, propitiate.

intercession, n. mediation, interposition, propitiation.

intercessor, n. mediator, interceder, propitiator, make-peace.

interchange, n. reciprocation, reciprocity, permutation; alternation.

interest, n. concern; share, portion, part, participation; advantage, benefit, weal, behoof; usury.  Antonyms:  boredom, ennui, indifference, unconcern.

interested, a. concerned; prejudiced, partial.  Antonyms:  disinterested, unconcerned, bored.

interfere, v. clash, conflict; intermeddle, interpose, intervene.

interference, n. clashing, collision; intermeddling, interposition, intervention.

interlining, n. interlineation.

interloper, n. intruder, interferer.

intermediate, a. intervening, interjacent; interlocutory (Law).

intermittent, a. remittent, periodical, recurrent.

internal, a. inward, interior, inside, inner; esoteric; intrinsic; inherent.

interpret, v. construe, translate, render.

interpretation, n. rendering, rendition, translation; exegesis, exegetics, hermeneutics, isagogics, anagogics, dittology.

interrogation point. eroteme.

interval, n. interstice (space between); interim, meantime

intervening, a. intermediate, interjacent.

intervention, n. interference, interposition; mediation, intercession.

intestines, n. pl. entrails, bowels, inwards, guts; omentum, caul, vermiform appendix, colon, rectum, hindgut, enteron, caecum, ileum, ileus, volvulus, jejunum, duodenum, alimentary canal; chitterlings.  Associated words:  enterology, splanchnology, enterography, splanchnography, enteropathy, enteroplasty, enterotomy, enteralgia, enterolith, enteritis, intestinal, enteric, crypt, peristalsis, vermiculation, alvine, viscerate, visceration, eviscerate, evisceration, disembowel, disembowelment.

intolerable, a. insufferable, unendurable.

intolerance, n. bigotry, dogmatism, illiberality.

intolerant, a. bigoted, unforbearing, illiberal.

intrenchment, n. earthwork, fortification; encroachment, infringement, invasion, inroad.