Immaterial—unimportant, insignificant, inconsiderable, inconsequential, uncorporeal, unsubstantial, unconditioned, spiritual.
Immediatly—directly, instantly.
Immense—vast, huge, enormous, prodigious, unlimited.
Immodest—impudent, bold, indelicate, shameless, indecent, unchaste.
Impair—lessen, weaken, injure, decrease.
Impart—grant, bestow, communicate, reveal, disclose, divulge.
Impatiant—uneasy, restless, eager, hasty.
Impeach—Censure, reproach, arraign, accuse.
Impede—hinder, delay, obstruct, retard.
Impediment—obstruction, obstacle, hinderance.
Impel—urge, force, incite, induce, instigate, animate, encourage.
Impending—imminent, threatening.
Imperative—commanding, authoritative, imperious, despotic.
Imperfection—wanting, blemish, fault, defect, failing, frailty, foible, weakness.
Imperious—commanding, haughty, domineering, imperative, proud, lordly, over bearing, tyrannical.
Impertinent—rude, quarrelsome, intrusive, insolent, meddling, troublesome, irrelevant.
Impetuous—hasty, rough, violent, vehement, forcible, boisterous.
Implicate—involve, entangle, embarrass.
Implore—beg, beseech, ask, entreat, supplicate, solicit, request.
Imply—mean, signify, denote, infer, involve.
Importance—weight, moment, signification, consequence.
Imposture—deceit, deception, cheat, fraud, imposition, counterfeit, artifice.
Imprecation—execration, curse, malediction, anathema.
Improve—Cultivate, correct, reform, rectify, amend, advance.
Impudent—insolent, bold, rude, saucy, impertinent, uncouth, shameless, immodest.
Impute—charge, attribute, ascribe.
Inability—disability, weakness, impotence.
Inactive—sluggish, lazy, idle, slothful, inert, drowsy.
Inadequate—insufficient, incompetent, unable, incapable.
Inattentive—negligent, heedless, careless, inadvertent, thoughtless, dilatory, remiss.
Incessantly—constantly, continually, unremittingly, unceasingly.
Incident—contingency, event, circumstance.
Incite—provoke, excite, stimulate, arouse, encourage, animate, aggravate.
Include—contain, enclose, comprise, embrace, comprehend.
Incommode—molest, disturb, inconvenience, trouble, annoy.
Incompetent—inapt, insufficient, incapable, inadequate, unsuitable.
Inconsistent—incongruous, ridiculous, contrary, absurd.
Inconstant—unstable, uncertain, fickle, variable, changeable, versatile.
Indecent—unbecoming, impudent, immodest, indelicate.
Indicate—show, mark, point out, reveal.
Indifferent—passive, neutral, regardless, unconcerned, impartial.
Indigence—poverty, need, want, penury.
Indigenous—native.
Indignation—temper, anger, displeasure, contempt, resentment, wrath.
Indiscretion—imprudence, folly, injudiciousness.
Indispensiable—important, essential, necessary.
Indisputable—undeniable, indubitable, unquestionable, incontrovertible, conclusive, settled.
Indistinct—confused, ambiguous, doubtful, dark.
Induce—persuade, lead, influence, urge, instigate, actuate.
Industrious—diligent, persevering, laborious, assiduous, active.
Inevitable—unayoidable, certain.
Inexorable—immoyable, unyielding, relentless, implacable.
Inexpedient—unsuitable, unfit, inconvenient.
Infect—taint, corrupt, defile, contaminate, pollute.
Inference—deduction, conclusion.
Inferior—less, lower, secondary, subservient, subordinate.
Infested—disturbed, troubled, plagued, annoyed.
Infinite—boundless, unbounded, illimitable, unlimited, immense, eternal.
Infirm—weak, sickly, decrepit, feeble, debilitated, imbecile.
Influence—authority, power, credit, favor, sway, persuasion.
Information—notice, intelligence, counsel, advice, instruction.
Ingenious—inventive, talented, skillful.
Ingenuity—Capacity, genius, invention, skill, talent.
Inhabit—dwell, occupy, reside, stay, abide, sojourn.
Inherent—innate, inborn, inbred.
Inhuman—cruel, barbarous, gavage, brutal.
Inquitous—unjust, evil, wicked, nefarious.
Injunction—order, command, mandate, precept.
Injure—harm, hurt, impair, damage, deteriorate.
Innate—natural, inherent, inbred, inborn.
Innocent—pure, blameless, guiltless, faultless, inoffensive, harmless, spotless.
Inordinate—immoderate, excessive, intemperate, irregular.
Inquisitive—curious, enquiring, anxious, prying.
Insanity—derangement, craziness, madness, lunacy, mania.
Insensibility—dullness, apathy, indifference, stupidity, torpor, imperceptibility.
Insidious—deceitful, sly, crafty, cunning, subtle, treacherous.
Insignificant—worthless, meaningless, inconsiderable, trivial, unimportant.
Insinuate—hint, suggest, intimate.
Insolent—insulting, abusive, rude, haughty, saucy, offensive, impertinent.
Inspire—animate, invigorate, cheer, enliven, exhilarate, suggest.
Instigate—tempt, incite, urge, encourage, impel, stimulate, move.
Instil—infuse, implant, sow.
Instruction—education, teaching, precept,suggestion, advice, counsel.
Insufficent—inadequate, incapable, incompetent, unfit, unsuitable, unable.
Insult—abuse, affront, outrage, contempt, insolence, indignity.
Integrity—purity, probity, truthfulness, uprightness, honesty.
Intellect—understanding, genius, ability, capacity, talent.
Intelligence—intimation, understanding, information, notice, knowledge, intellect.
Intemperate—excessive, immoderate, inordinate.
Intend—purpose, mean, design.
Intercede—mediate, interpose, interfere.
Interline—insert, alter, add, correct.
Intermission—Cessation, stop, rest, vacation, interruption.
Intermit—abate, suspend, subside, forbear.
Interpose—mediate, interfere, interpose, intermeddle.
Interpret—explain, demonstrate, elucidate, expound, decipher.
Interrogate—examine, question, inquire.
Interval—space, interstice, time.
Intervening—coming between, interposing, intermediate.
Intimidate—frighten, alarm, daunt, scare.
Intoxication—infatuation, inebriety, drunkenness.
Intractable—perverse, obstinate, stubborn, ungovernable, uncontrollable, unmanageable.
Intrepid—fearless, undaunted, bold, daring, valiant, courageous, brave.
Intrinsic—real, true, inherent, essential, inward, genuine.
Introductory—preliminary, previous, prefatory.
Intrude—invade, infringe, encroach, obtrude, entrench.
Intrust—confide, commit.
Invade—enter, attack, intrude, encroach, infringe.
Invalid—weak, sick, infirm, feeble, null, void.
Invalidate—weaken, injure, destroy, overthrow.
Invective—censure, abuse, railing, reproach, satire.
Invent—feign, fabricate, frame, conceive, discover, devise.
Invest—enclose, surround, confer, adorn, array, endow, endue.
Investigation—Search, examination, inquiry, scrutiny, research.
Inveterate—Obstinate, confirmed, constant, confirmed, fixed.
Invigorate—restore, strengthen, fortify.
Invincible—unyielding, unconquerable.
Involve—envelope, enwrap, entangle, implicate.
Irascible—irritable, hasty, fiery, hot, angry.
Ire—anger, temper, passion, wrath, resentment.
Irony—ridicule, sarcasm, satire, burlesque.
