Synonyms and Antonyms in English

First let us understand the meaning of Synonym and Antonym.

Synonyms
Synonyms are the words having the same meaning.

For Example -
Happiness - delight - pleasure
Sadness - Sorrow - grief

Antonyms
Antonyms are the words having opposite meaning.

For Example -
Happiness  X Sadness

I will add synonyms and antonyms for commonly used words in below table soon.

1. brave  X  coward
2. silly  X  clever
3. happy, cheerful,joyful  X  sad, sorrowful, grieving
4. careful X careless
5. worried, anxious X Unconcerned, carefree 
6. calm  X  stormy
7. soft  X  rough
8. angry  X  peaceful
9. come  X  go
10. open  X close
11. take  X  give
12. praise, admire  X  criticise, scold
13. hold  X  release
14. front  X  behind
15. straight  X  zigzag
16. tasty  X  tasteless
17. evil, immoral, wicked  X  good, virtuous, pleasant
18. devil, demon  X  angel, god
19. dirty  X  clean
20. fair  X  unfair
21. honest  X  dishonest
22. tiny, small  X  huge, large
23. significant  X  insignificant, trivial
24. important, essential  X  unimportant, inessential
25. kind, warm-hearted  X  cruel, stone-hearted
26. fast, quick  X  slow
27. busy  X  free, idle
28. firm, resolute  X  irresolute, wavering
29. difference, dissimilarity  X  resemblance, similarity
30. lose  X  find
31. available  X  unavailable
32. concentration  X  distraction
33. display  X  hide
34. wake up  X  sleep
35. stand up  X  sit down
36. right  X  wrong
37. success  X  failure
38. acquit  X  convict
39. agreement  X  disagreement
40. annoy, irritate  X  please, gratify
41. peril, danger X  safety, security
42. start, begin  X  finish, end
43. ignore, disregard  X  pay attention, pay heed, acknowledge
44. refuse, reject, deny  X  accept, approve, permit
45. build  X  destroy
46. dry  X  wet
47. problem, issue  X  solution
48. nearby, close  X  far, distant
49. save  X  waste
50. light  X  heavy
51. light  X  darkness
52. move  X  stagnate
53. more  X  less
54. much  X  little
55. many  X  few
56. fertile  X  infertile, barren
57. silent  X  noisy
58. private  X  public
59. ready  X  unprepared
60. arrest  X  release
61. turn on, switch on  X  turn off, switch off
62. put on  X  take off
63. online  X  offline
64. new  X  old
65. melodious  X  discordant
66. pleasant  X  unpleasant
67. Everyone  X  none
68. trust  X  distrust, mistrust
69. special  X  ordinary
70. encourage  X  discourage
71. hell  X  heaven
72. early X  late
73. son  X  daughter
74. boy  X  girl
75. man  X  woman
76. lady  X  gentleman
77. masculine  X  feminine
78. black  X  white
79. forget  X  remember
80. clear  X  vague, unclear  

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