Synonyms and Antonyms (Section I)

By | November 15, 2016

Synonyms and antonyms of essential English words are starting with alphabet ‘I’. Learning synonyms and antonyms for the words in this section ‘I’ will be helpful for the aspirants preparing for competitive examinations on English language testing. This section ‘I’ covers terms such as ideal, identical, ignite, ignorant, illegitimate, illicit, immense, impartial, inclusive, increment, indifferent, industrious, inevitable, infinite, initial, innovative, inquisitive, insane, insignificant, intensify, intervene, intimate, invert, invincible, irritate, isolate, itinerant, etc.

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