Here is a list of 250 important SAT vocabulary words and phrases to know:

1. Abandon
2. Abate
3. Aberration
4. Abject
5. Abjure
6. Abnegation
7. Abrogate
8. Abscond
9. Abstruse
10. Abysmal
11. Accede
12. Acumen
13. Adamant
14. Adapt
15. Admonish
16. Advantageous
17. Affluent
18. Alacrity
19. Ambivalence
20. Anomaly
21. Antipathy
22. Antiseptic
23. Apt
24. Assertion
25. Assiduous
26. Bane
27. Beguile
28. Benevolent
29. Bolster
30. Bombastic
31. Boon
32. Brevity
33. Brusque
34. Camaraderie
35. Candid
36. Candor
37. Carouse
38. Carp
39. Catastrophic
40. Cavort
41. Censorious
42. Circumlocution
43. Circumscribe
44. Clamor
45. Clout
46. Cognizant
47. Commensurate
48. Comparable
49. Complement
50. Complex
51. Compunction
52. Concomitant
53. Conducive
54. Conduit
55. Conflagration
56. Conform
57. Connive
58. Conscientious
59. Consign
60. Constant
61. Constituent
62. Constructive
63. Construe
64. Contend
65. Contusion
66. Contrite
67. Contentious
68. Contravene
69. Convivial
70. Corpulence
71. Covet
72. Cupidity
73. Dearth
74. Debacle
75. Debauch
76. Defunct
77. Demagogue
78. Demur
79. Denigrate
80. Despot
81. Diaphanous
82. Dirge
83. Discomfit
84. Disparate
85. Disrepute
86. Duplicity
87. Duress
88. Eclectic
89. Edict
90. Ebullient
91. Efficacious
92. Effluvia
93. Egregious
94. Elegy
95. Elicit
96. Eloquent
97. Elude
98. Emollient
99. Empirical
100. Emulate
101. Enervate
102. Engender
103. Ephemeral
104. Equanimity
105. Equivocal
106. Evanescent
107. Evince
108. Exacerbate
109. Exhort
110. Execrable
111. Exigent
112. Expedient
113. Expiate
114. Expunge
115. Extraneous
116. Extol
117. Facilitate
118. Fallacious
119. Fatuous
120. Flagrant
121. Forbearance
122. Fortuitous
123. Fractious
124. Garrulous
125. Grandiloquent
126. Grapple
127. Gratuitous
128. Hapless
129. Hegemony
130. Heterogeneous
131. Iconoclast
132. Impecunious
133. Insidious
134. Instigate
135. Insurgent
136. Interlocutor
137. Inure
138. Intransigent
139. Inveterate
140. Irreverence
141. Largesse
142. Licentious
143. Litigant
144. Maelstrom
145. Maudlin
146. Maverick
147. Mawkish
148. Maxim
149. Mendacious
150. Meretricious
151. Modicum
152. Momentous
153. Morass
154. Munificent
155. Nadir
156. Negligent
157. Neophyte
158. Noisome
159. Noxious
160. Obdurate
161. Obfuscate
162. Obstreperous
163. Officious
164. Onerous
165. Ostensible
166. Ostracism
167. Palliate
168. Panacea
169. Paradigm
170. Pariah
171. Paucity
172. Pejorative
173. Penchant
174. Penurious
175. Pert
176. Pernicious
177. Pertinacious
178. Phlegmatic
179. Philanthropic
180. Pithy
181. Plaudit
182. Plenitude
183. Plethora
184. Polar
185. Postulate
186. Potentate
187. Pragmatic
188. Preclude
189. Predilection
190. Probity
191. Proclivity
192. Profligate
193. Profound
194. Promulgate
195. Proscribe
196. Protean
197. Prurient
198. Puerile
199. Pugnacious
200. Punctilious
201. Quaint
202. Quixotic
203. Quandary
204. Recalcitrant
205. Relegate
206. Remiss
207. Reprieve
208. Reprobate
209. Rescind
210. Ribald
211. Rife
212. Sanctimonious
213. Sanguine
214. Scurrilous
215. Serendipity
216. Solicitous
217. Spurious
218. Staid
219. Stolid
220. Substantial
221. Supercilious
222. Supposition
223. Surfeit
224. Surmise
225. Surreptitious
226. Tangential
227. Tenable
228. Terse
229. Torpid
230. Travesty
231. Trenchant
232. Trounce
233. Truculent
234. Turpitude
235. Ubiquitous
236. Umbrage
237. Unconventional
238. Undulate
239. Unmitigated
240. Unveil
241. Upbraid
242. Upshot
243. Usury
244. Validate
245. Veracity
246. Vestige
247. Viability
248. Vicissitude
249. Vilify
250. Virtuoso

This list covers many of the most important SAT vocabulary words that commonly appear on the test. Familiarizing yourself with these words and their definitions can help improve your performance on the SAT Reading and Writing sections124567.