These all synonyms and antonyms will very helpful and will increase your intelligence skills.
Important Synonyms and Antonyms starts with “A”
| No. | Word | Synonyms | Antonyms | 
| 1. | Alien | foreigner, outsider | native, resident | 
| 2. | Affront | provoke, irreverence | conciliate, mollify | 
| 3. | Adversity | misfortune, calamity | prosperity, fortune | 
| 4. | Antipathy | hostility, aversion | admiration, fascination | 
| 5. | Amplify | enlarge, extend | lessen, contract | 
| 6. | Alleviate | abate, relieve | aggravate, enhance | 
| 7. | Admonish | counsel, reprove | approve, applaud | 
| 8. | Adherent | follower, disciple | rival, adversary | 
| 9. | Awkward | clumsy, rough | clever, apt | 
| 10. | Allure | entice, fascinate | repulse, repel | 
| 11. | Abortive | vain, unproductive | effectual, productive | 
| 12. | Allay | pacify, soothe | aggravate, excite | 
| 13. | Axiom | maxim, truth | absurdity, blunder | 
Important Synonyms and Antonyms starts with “B”
| 14. | Barbarous | uncivilized, savage | cultured, humane | 
| 15. | Baffle | frustrate, perplex | compose, facilitate | 
| 16. | Bewitching | magical, fascinating | repulsive, repugnant | 
Important Synonyms and Antonyms starts with “C”
| 17. | Concur | approve, agree | differ, disagree | 
| 18. | Chastise | punish, admonish | cheer, encourage | 
| 19. | Chaste | virtuous, pure | sullied lustful | 
| 20. | Capable | competent, able | incompetent, inept | 
| 21. | Captivity | imprisonment, confinement | freedom, liberty | 
| 22. | Captivate | charm, fascinate | disillusion, offend | 
| 23. | Calumny | defamation, aspersion | commendation, praise | 
| 24. | Callous | obdurate, unfeeling | compassionate, tender | 
| 25. | Calamity | adversity, misfortune | happiness, fortune | 
| 26. | Cavity | depth, depression | elevation, projection | 
| 27. | Cease | terminate, desist | begin, originate | 
Important Synonyms and Antonyms starts with “D”
| 28. | Defray | spend, pay | disclaim, repudiate | 
| 29. | Defile | contaminate, pollute | purify, sanctity | 
| 30. | Defer | prolong, suspend | accelerate, expedite | 
| 31. | Dedicate | devote, consecrate | refuse, negate | 
| 32. | Decipher | interpret, reveal | misinterpret, distort | 
| 33. | Deceit | deception, artifice | veracity, sincerity | 
| 34. | Decay | collapse, decompose | flourish, progress | 
| 35. | Dainty | elegant, delicate | clumsy, coarse | 

Important Synonyms and Antonyms starts with  “E”
| 36. | Endeavour | undertake, aspire | cease, quit | 
| 37. | Encumbrance | hindrance, obstacle | incentive stimulant | 
| 38. | Eloquence | expression, fluency | halting, stammering | 
| 39. | Eliminate | expel, oust | restore, accept | 
| 40. | Elevate | dignify, heighten | deprecate, denounce | 
| 41. | Efface | destroy, obliterate | retain, maintain | 
| 42. | Ecstasy | delight, exultation | despair, calamity, depression | 
| 43. | Eccentric | strange abnormal | natural, conventional | 
Important Synonyms and Antonyms starts with “F”
| 44. | Fleeting | transient, temporary | enduring, eternal | 
| 45. | Feud | strife, quarrel | fraternity, harmony | 
| 46. | Ferocious | cruel, fierce | gentle, sympathetic | 
| 47. | Feeble | weak, frail | strong, robust | 
| 48. | Fantastic | fanciful, uncommon | ordinary, normal | 
| 49. | Fanatical | narrow-minded, biased | liberal, tolerant | 
| 50. | Falter | stumble, demur | persist, endure | 
| 51. | Fallacy | delusion, mistake | veracity, truth | 
Important Synonyms and Antonyms starts with “G”
| 52. | Gracious | courteous, beneficent | rude, unforgiving | 
| 53. | Gorgeous | magnificent, dazzling | dull, unpretentious | 
| 54. | Glut | stuff, satiate | starve, abstain | 
| 55. | Gloom | obscurity, darkness | delight, mirth | 
Important Synonyms and Antonyms starts with “H”
| 56. | Haughty | arrogant, pompous | humble, submissive | 
| 57. | Harass | irritate, molest | assist, comfort | 
| 58. | Hapless | unfortunate, ill-fated | fortunate, lucky | 
| 59. | Haphazard | random, unsorted | considered, arranged | 
| 60. | Hamper | retard, prevent | promote, facilitate | 
Important Synonyms and Antonyms starts with “I”
| 61. | Incongruous | inappropriate, absurd | compatible, harmonious | 
| 62. | Incompetent | inefficient, unskilled | dexterous, skilled | 
| 63. | Inclination | disposition, affection | disinclination, indifference | 
| 64. | Impute | attribute, ascribe | exculpate, support | 
| 65. | Impious | irreligious, unholy | pious, devout | 
| 66. | Impediment | hurdle, obstruction | assistance, concurrence | 
| 67. | Impartial | just, unbiased | prejudiced, biased | 
| 68. | Impair | diminish, deteriorate | restore, revive | 
| 69. | Immunity | prerogative, privilege | blame, censure | 
| 70. | Imminent | impending, brewing | distant, receding | 
| 71. | Immerse | submerge, involve | emerge, uncover | 
| 72. | Immense | huge, enormous | puny, insignificant | 
| 73. | Immaculate | unsullied, spotless | defiled, tarnished | 
Important Synonyms and Antonyms starts with “J”
| 74. | Jubilant | rejoicing, triumphant | melancholy, depressing | 
| 75. | Jovial | frolicsome, cheerful | solemn, morose | 
| 76. | Jaded | tired exhausted | renewed, recreated | 
| 77. | Jejune | dull, boring | interesting, exciting | 
Important Synonyms and Antonyms starts with “K”
| 78. | Knave | dishonest, scoundrel | paragon, innocent | 
| 79. | Knell | death knell, last blow | reconstruction, rediscovery | 
| 80. | Knotty | complicated, difficult | simple, manageable | 
Important Synonyms and Antonyms starts with “L”
| 81. | Linger | loiter, prolong | hasten, quicken | 
| 82. | Liberal | magnanimous, generous | stingy, malicious | 
| 83. | Liable | accountable, bound | unaccountable, apt to | 
| 84. | Lenient | compassionate, merciful | cruel, severe | 
| 85. | Lax | slack, careless | firm, reliable | 
| 86. | Lavish | abundant, excessive | scarce, deficient | 
Important Synonyms and Antonyms starts with  “M”
| 87. | Mollify | appease, assuage | irritate, infuriate | 
| 88. | Molest | harass, tease | console, soothe | 
| 89. | Modest | humble, courteous | arrogant, pompous | 
| 90. | Mitigate | alleviate, relieve | augment, enhance | 
| 91. | Miraculous | marvellous, extraordinary | ordinary, trivial | 
| 92. | Minute | diminutive, miniature | large, colossal | 
Important Synonyms and Antonyms starts with “N”
| 93. | Numerous | profuse, various | scarce, deficient | 
| 94. | Nullify | cancel, annul | confirm, uphold | 
| 95. | Noxious | baneful, injurious | healing, profitable | 
| 96. | Novice | tyro, beginner | veteran, ingenious | 
Important Synonyms and Antonyms starts with “O”
| 97. | Offspring | descendant, sibling | ancestor, forefather | 
| 98. | Offensive | abhorrent, arrogant | docile, compliant | 
| 99. | Odious | malevolent, obnoxious | engaging, fascinating | 
| 100. | Occult | latent, ambiguous | intelligible, transparent | 
| 101. | Obvious | evident, apparent | obscure, ambiguous | 
| 102. | Obstruct | impede, prevent | hasten, encourage | 
Important Synonyms and Antonyms starts with “P”
| 103. | Predicament | plight, dilemma | resolution, confidence | 
| 104. | Precarious | doubtful, insecure | assured, undeniable | 
| 105. | Pompous | haughty, arrogant | unpretentious, humble | 
| 106. | Perverse | petulant, obstinate | complacent, docile | 
| 107. | Pertness | flippancy, impudence | modesty, diffidence | 
| 108. | Peevish | perverse, sullen | suave, amiable | 
| 109. | Peerless | matchless, unrivalled | mediocre, commonplace | 
| 110. | Paramount | foremost, eminent | trivial, inferior | 
| 111. | Pamper | flatter, indulge | deny, disparage | 
| 112. | Placid | tranquil, calm | turbulent, hostile | 
Important Synonyms and Antonyms starts with “Q”
| 113. | Quibble | equivocate, prevaricate | unfeign, plain | 
| 114. | Quarantine | seclude, screen | befriend, socialize | 
| 115. | Questionable | dubious, disputable | reliable, authentic | 
Important Synonyms and Antonyms starts with “R”
| 116. | Retract | recant, withdraw | confirm, assert | 
| 117. | Remote | inaccessible, farther | adjoining, adjacent | 
| 118. | Remorse | regret, penitence | ruthlessness, obduracy | 
| 119. | Resentment | displeasure, wrath | content, cheer | 
| 120. | Remnant | residue, piece | entire, whole | 
Important Synonyms and Antonyms starts with “S”
| 121. | Shrewd | cunning crafty | simple, imbecile | 
| 122. | Stupor | lethargy, unconsciousness | sensibility, consciousness | 
| 123. | Squalid | dirty, filthy | tidy, attractive | 
| 124. | Sporadic | intermittent, scattered | incessant, frequent | 
| 125. | Solicit | entreat, implore | protest, oppose | 
| 126. | Sneer | mock, scorn | flatter, praise | 
| 127. | Slander | defame, malign | applaud, approve | 
| 128. | Shabby | miserable, impoverished | prosperous, thriving | 
| 129. | Saucy | impudent, insolent | modest, humble | 
Important Synonyms and Antonyms starts with “T”
| 130. | Temperate | cool, moderate | boisterous, violent | 
| 131. | Tedious | wearisome, irksome | exhilarating, lively | 
| 132. | Taciturn | reserved, silent | talkative, extrovert | 
| 133. | Taboo | prohibit, ban | permit, consent | 
| 134. | Throng | assembly, crowd | dispersion, sparsity | 
| 135. | Tumultuous | violent, riotous | peaceful, harmonious | 
Important Synonyms and Antonyms starts with “U”
| 136. | Uncouth | awkward, ungraceful | elegant, graceful | 
| 137. | Umbrage | resentment, bitterness | sympathy, goodwill | 
Important Synonyms and Antonyms starts with “V”
| 138. | Valour | bravery, prowess | fear, cowardice | 
| 139. | Vagrant | wanderer, roaming | steady, settled | 
| 140. | Vigilant | cautious, alert | careless, negligent | 
| 141. | Valid | genuine, authentic | fallacious, deceptive | 
| 142. | Veteran | ingenious, experienced | novice, tyro | 
| 143. | Venom | poison, malevolence | antidote, benevolent | 
Important Synonyms and Antonyms starts with “W”
| 144. | Wield | use, employ | forgo, avoid | 
| 145. | Wan | pale, faded | bright, healthy | 
| 146. | Wicked | vicious, immoral | Virtuous, noble | 
| 147. | Wed | marry, combine | divorce, separate | 
Important Synonyms and Antonyms starts with “Y”
| 148. | Yearn | languish, crave | content, satisfy | 
| 149. | Yell | shout, shriek | whisper, muted | 
Important Synonyms and Antonyms starts with “Z”
| 150. | Zeal | eagerness, fervour | apathy, lethargy | 
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