List of Synonyms and Antonyms of “I” Words

Words Synonyms Antonyms
Ideal exemplary, model, standard, perfect, supreme, hypothetical flawed, imperfect, problematic
Identical same, similar, equal, equivalent, tantamount, even distinct, diverse, dissimilar
Ignite kindle, fire, light, inflame, alight, burn, incense extinguish, pacify, quench
Ignorant illiterate, uneducated, unaware, oblivious, unacquainted, benighted aware, knowledgeable, literate
Illegitimate illegal, illicit, outlawed, bastard, spurious, misbegotten authorized, ethical, moral
Illicit lawless, unlawful, wrongful, felonious, clandestine, adulterous legitimate, noble, proper
Immense enormous, monumental, vast, titanic, colossal, elephantine tiny, minute, paltry
Impartial dispassionate, equitable, indifferent, unbiased, nonpartisan, just prejudiced, partial, discriminating
Impromptu extemporary, improvised, offhand, unrehearsed, ad-lib, unprepared deliberate, planned, premeditated
Inclusive comprehensive, expansive, extensive, sweeping, widespread, extended exclusive, narrow, selective
Increment advance, boost, hike, increase, jump, raise decrease, loss, slump
Indifferent dispassionate, objective, just, apathetic, nonpartisan, square concerned, caring, sympathetic
Industrious assiduous, objective, just, apathetic, nonpartisan, square concerned, caring, sympathetic
Inevitable certain, inescapable, unavoidable, definite, sure, doomed uncertain, unlikely, unsure
Infinite boundless, eternal, endless, unlimited, countless, innumerable definite, limited, measurable
Initial inceptive, beginning, introductory, primary, primordial closing, final, last
Innovative ingenious, inventive, original, improvised, unprecedented, novel customary, habitual, traditional
Inquisitive curious, nosy, snoopy, inquiring, questioning, investigate disinterested, indifferent, incurious
Insane crazy, daft, unsound, maniac, lunatic, dotty sane, rational, logical
Insignificant trivial, inconsequent, inconsiderable, meager, immaterial, negligible significant, substantial, valuable
Intensify aggravate, deepen, enhance, heighten, redouble, increase weaken, soothe, lower
Intervene interfere, intrude, meddle, obtrude, intercede, interpose ignore, withdraw, avoid
Intimate close, familiar, friendly, interior, confidential, personal formal, incompatible, cool
Invert reverse, transpose, turn, flip, upturn, backtrack advance, forward, hold
Invincible impregnable, indomitable, unconquerable, unbeatable, unyielding, insurmountable beatable, conquerable, breakable
Irritate aggravate, bug, exasperate, fret, peeve, nettle assuage, please, aid
Isolate seclude, segregate, insulate, separate, detach, remove integrate, incorporate, mingle
Itinerant nomadic, vagabond, vagrant, migratory, migrant, wanderer permanent, settled, resident