These two things are exactly different:

  1. absence - presence
  2. accept - refuse
  3. accurate - inaccurate
  4. advantage - disadvantage
  5. alive - dead
  6. always - never
  7. ancient - modern
  8. answer - question, query
  9. approval - disapproval
  10. approached - receded, departed
  11. abundant - scarce
  12. admit - deny
  13. advance - retreat, retire
  14. artificial - natural
  15. arrival - departure
  16. ascend - descend
  17. attack - defense
  18. attractive - repulsive
  19. attention - inattention
  20. asleep - awake
  21. ally - enemy
  22. agree - disagree
  23. bad - good
  24. backward - forward, onward
  25. bend - straighten
  26. beautiful - ugly
  27. beginning - ending
  28. below - above
  29. bent - straight
  30. big - small, little
  31. blunt - sharp
  32. better - worse
  33. best - worst
  34. black - white
  35. blame - praise
  36. bless - curse
  37. bitter - sweet
  38. borrow - lend
  39. bravery - cowardice
  40. build - destroy, demolish
  41. bold - timid, meek
  42. bright - dull
  43. broad - narrow
  44. clear - vague, cloudy
  45. careful - rush, careless
  46. calm - troubled
  47. capable - incapable
  48. captivity - freedom, liberty
  49. cellar - attic
  50. cheap - dear, expensive
  51. close - distant
  52. clever - stupid
  53. cold - hot
  54. combine - separate
  55. clockwise - anti-clockwise
  56. correct - incorrect
  57. conceal - reveal
  58. come - go
  59. common - rare
  60. comfort - discomfort
  61. courage - cowardice
  62. cruel - kind
  63. courteous - discourteous, rude
  64. cunning - simple
  65. dainty - clumsy
  66. danger - safety
  67. dark - light
  68. deep - shallow
  69. decrease - increase
  70. definite - indefinite
  71. demand - supply
  72. despair - hope
  73. disappear - appear
  74. disease - health
  75. discourage - encourage
  76. dismal - cheerful
  77. doctor - patient
  78. dry - wet
  79. dull - clear, bright
  80. dusk - dawn
  81. early - late
  82. easy - difficult
  83. ebb - flow
  84. East - West
  85. economise - waste
  86. encourage - discourage
  87. entrance - exit
  88. employer - employee
  89. empty - full
  90. excited - calm
  91. end - beginning
  92. expand - contract
  93. expensive - inexpensive, cheap
  94. export - import
  95. exterior - interior
  96. external - internal
  97. fail - succeed
  98. false - true
  99. feeble - sturdy, strong, powerful
  100. foolish - wise
  101. fast - slow
  102. few - many
  103. famous - unknown
  104. forelegs - hind legs
  105. fat - thin
  106. find - lose
  107. first - last
  108. freedom - captivity
  109. fold - unfold
  110. frequent - seldom
  111. forget - remember
  112. found - lost
  113. fresh - stale
  114. friend - enemy
  115. fortunate - unfortunate
  116. frank - secretive
  117. full - empty
  118. generous - mean
  119. gentle - rough
  120. gather - distribute
  121. glad - sorry
  122. gloomy - cheerful
  123. giant - dwarf, pygmy
  124. granted - refused
  125. great - minute, small, little
  126. guardian - ward
  127. guest - host
  128. guilty - innocent
  129. happy - sad, miserable
  130. hard - soft
  131. harmful - harmless
  132. hasten - dawdle
  133. hate - love
  134. healthy - unhealthy, ill, diseased
  135. here - there
  136. heavy - light
  137. height - depth
  138. hero - coward
  139. hill - valley
  140. horizontal - vertical
  141. hinder - aid, help
  142. honest - dishonest
  143. humble - proud
  144. hunger - thirst
  145. imitation - genuine
  146. immense - tiny, minute
  147. imprison - free
  148. include - exclude
  149. increase - decrease
  150. inhabited - uninhabited
  151. inferior - superior
  152. inside - outside
  153. intelligent - unintelligent, stupid
  154. inhale - exhale
  155. interior - exterior, outside
  156. interesting - uninteresting, dull
  157. internal - external
  158. intentional - accidental
  159. join - separate
  160. junior - senior
  161. justice - injustice
  162. king - subject
  163. knowledge - ignorance
  164. laugh - cry
  165. lawful - unlawful
  166. lazy - industrious, energetic
  167. land - sea
  168. landlord - tenant
  169. large - little, small
  170. last - first
  171. lawyer - client
  172. lecturer - student
  173. lender - borrower
  174. lengthen - shorten
  175. left - right
  176. less - more
  177. light - dark, heavy
  178. like - dislike, unlike
  179. likely - unlikely
  180. leader - follower
  181. little - large, much, big
  182. lofty - lowly
  183. long - short
  184. loud - soft
  185. loss - find, win
  186. low - high
  187. loyal - disloyal
  188. mad - sane
  189. magnetize - demagnetize
  190. master - servant
  191. mature - immature
  192. maximum - minimum
  193. me - you
  194. merry - mirthless, sad
  195. minority - majority
  196. miser - spendthrift
  197. misunderstand - understand
  198. narrow - wide
  199. near - far, distant
  200. neat - untidy
  201. new - old
  202. night - day
  203. noisy - quiet
  204. North - South
  205. obedient - disobedient
  206. odd - even
  207. offer - refuse
  208. open - shut
  209. optimist - pessimist
  210. out - in
  211. parent - child
  212. past - present
  213. patient - impatient
  214. peace - war
  215. peanut butter - jelly
  216. permanent - temporary
  217. please - displease
  218. plentiful - scarce
  219. poetry - prose
  220. possible - impossible
  221. poverty - wealth
  222. powerful - feeble, weak
  223. polite - impolite, rude
  224. private - public
  225. prudent - imprudent
  226. pretty - unsightly, ugly
  227. pure - impure
  228. qualified - unqualified
  229. rapid - slow
  230. regularly - irregularly
  231. rich - poor
  232. right - wrong, left
  233. rigid - pliable, soft
  234. rough - smooth
  235. satisfactory - unsatisfactory
  236. security - insecurity
  237. scatter - collect
  238. serious - trivial
  239. second-hand - new
  240. sense - nonsense
  241. shopkeeper - customer
  242. singular - plural
  243. simple - complicated
  244. slim - thick, stout
  245. solid - liquid
  246. sober - drunk
  247. speaker - listener
  248. sour - sweet
  249. sorrow - joy
  250. sow - reap
  251. stand - lie
  252. straight - crooked
  253. strong - weak
  254. success - failure
  255. sunny - cloudy
  256. take - give
  257. tall - short
  258. tame - wild
  259. teacher - pupil
  260. thick - thin
  261. tight - slack, loose
  262. top - bottom
  263. transparent - opaque
  264. truth - untruth, lie
  265. up - down
  266. vacant - occupied
  267. valuable - valueless
  268. victory - defeat
  269. virtue - vice
  270. visible - invisible
  271. voluntary - compulsory
  272. vowel - consonant
  273. wax - wane
  274. wisdom - folly
  275. within - without
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