1. a / an / one

2. able / capable

3. accident / incident

4. accurate / exact / precise

5. ache / pain / hurt

6. actual / current / present

7. administrator / boss / manager

8. adverse / averse

9. advice / advise

10. affect / effect

11. afraid / scared / frightened

12. after / later

13. agenda / itinerary / schedule

14. ago / back / before

15. aid / assist / help

16. aim / goal / objective

17. alien / foreigner / stranger

18. alive / life / live

19. all / whole / every

20. all of / each of

21. all ready / already / all right / alright

22. allow / let / permit

23. allude / elude

24. almost / mostly / nearly

25. alone / lonely / only

26. already / yet

27. also / as well / too

28. altar / alter

29. although / though / even though

30. among / between

31. amoral / immoral

32. amount / number / quantity

33. ancient / antique

34. angry / upset

35. another / other / others

36. answer / reply / respond

37. any / some

38. apartment / flat / studio

39. apologize / sorry

40. apology / excuse

41. appraise / apprise

42. arrive / come / get / reach

43. as far as / as long as / as soon as

44. assure / ensure / insure

45. automobile / car / vehicle

46. await / wait / hope / expect

47. award / reward / prize

48. awkward / embarrassing

49. baggage / luggage

50. beach / coast / shore

51. beautiful / pretty

52. become / get / turn

53. been / gone

54. before / in front of / opposite / across from

55. beg / plead

56. begin / start

57. belong to / belong with / belong in

58. below / under / beneath / underneath

59. beside / besides

60. big / large

61. big / small / long / short / tall / huge / tiny

62. bill / invoice / receipt

63. blanket / comforter / quilt

64. borrow / lend / loan / owe

65. bother / disturb

66. bravery / courage

67. bring / take

68. bring up / grow up

69. Britain / England / the United Kingdom

70. broad / wide

71. by / until

72. can / could / able to

73. capital / capitol

74. carpet / mat / rug

75. ceiling / roof

76. chance / possibility / opportunity

77. change / switch

78. chauffeur / driver

79. city / downtown / town

80. classic / classical

81. clever / intelligent / smart

82. close / shut

83. close to / near / next to

84. cloth / clothes / clothing

85. collect / gather

86. come back / go back / get back

87. compliment / complement

88. concern / concerned / concerning

89. confident / confidant / confidence

90. continually / continuously

91. convince / persuade

92. could / should / would

93. council / counsel

94. critic / critical / criticism / critique

95. cure / treat / heal / recover

96. custom / habit

97. deadly / fatal / lethal

98. decent / descent / dissent

99. decline / deny / refuse / reject

100. defect / fault / flaw

101. definitely / definitively

102. delay / late / postpone

103. despite / in spite of

104. die / died / dead

105. difficult / hard

106. dilemma / quandary

107. dinner / supper / meal / snack

108. dirt / earth / soil

109. dirty / messy

110. disability / handicap / impairment

111. discover / find out / notice / realize

112. discreet / discrete

113. disease / illness

114. disinterested / uninterested

115. distinct / distinctive

116. do / make

117. dress / dressed / wear

118. during / while / meanwhile / meantime

119. e.g. / i.e.

120. early / soon

121. earn / gain / win

122. economic / economical

123. effective / efficient

124. either / neither

125. electric / electrical / electronic

126. empathy / sympathy

127. employees / staff

128. end / finish

129. enough / too

130. enquire / inquire

131. especially / specially

132. every day / everyday

133. ex- / former / previous

134. explore / exploit

135. extend / expand

136. famous / infamous

137. farther / further

138. fee / fare / tax

139. female / feminine / woman

140. few / little / less / fewer

141. fit / match / suit

142. floor / ground

143. for / since

144. forest / jungle / wood / woods

145. fun / funny

146. girl / lady / woman

147. good / well

148. good evening / good night

149. gratuity / tip

150. guarantee / warranty

151. gut / guts

152. hard / hardly

153. have / have got

154. have to / must / need to

155. haven't / don't have

156. hear / listen

157. hijack / kidnap

158. historic / historical

159. holiday / vacation

160. hope / wish

161. hopefully / thankfully

162. hostel / hotel / motel

163. house / home

164. how about...? / what about...?

165. human / humankind / human being / man / mankind

166. hundred / hundreds

167. I / my / me / mine / myself

168. I = subject

169. if / whether

170. If I was... / If I were...

171. ignore / neglect

172. ill / sick

173. impending / pending

174. imply / infer

175. in / into / inside / within

176. in / on / at

177. incite / insight

178. income / salary / wage

179. Indian / indigenous / Native American

180. inhabit / live / reside

181. intend / tend

182. interested / interesting

183. interfere / intervene

184. its / it's

185. job / work / career

186. just / only

187. kinds / types / sorts

188. know / meet

189. last / latest

190. last / past

191. late / lately

192. lay / lie

193. like / as

194. little / small

195. look / see / watch

196. lose / loose

197. lose / miss

198. made of / made from

199. marriage / married / wedding

200. may / might

201. moral / morale

202. Mr. / Mrs. / Ms. / Miss

203. music / song

204. nausea / nauseous / queasy

205. north / northern

206. notable / noticeable

207. ocean / sea / lake / pond

208. oppress / suppress / repress

209. overtake / take over

210. pass away / pass out

211. pass the time / spend time

212. peak / pique

213. persons / peoples

214. poison / venom

215. politics / policy

216. poor / pore / pour

217. pray / prey

218. principal / principle

219. problem / trouble

220. quiet / silent

221. raise / rise / arise

222. regard / regards / regardless

223. regretful / regrettable

224. relation / relationship

225. remember / remind / reminder

226. replace / substitute

227. resolve / solve

228. review / revise

229. rob / thief / steal

230. safety / security

231. sale / sell

232. say / tell / speak

233. scream / shout

234. sensible / sensitive

235. shade / shadow

236. so / such

237. so / very / a lot

238. some time / sometime / sometimes

239. stuff / things

240. such as / as such

241. suppose / supposed to

242. then / than

243. think about / think of

244. tide / waves

245. till / until

246. to / for

247. too / very

248. travel / trip / journey

249. United

250. wake / awake / sleep / asleep

251. wander / wonder

252. wary / weary

253. what / which

254. which / that

255. who / whom

256. will / would

257. worse / worst

258. year-old / years old

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