Synonym: abrupt, hasty, impetuous, impulsive, unexpected, unforeseen. Antonym: gradual. Similar words: all of a sudden, buddy, added, a good deal, a good deal of, deny, dense, denial. Meaning: ['sʌdn] 
adj. happening without warning or in a short space of time.
adj. happening without warning or in a short space of time. 
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181. The scheme should ensure that borrowers are not penalized by sudden rises in mortgage rates.
182. First they announce their engagement and then they tell me Angie's pregnant - it's all a bit sudden really.
183. The sudden drop in share prices has set the government a tricky problem.
184. Progress toward democracy has to be made in steps, rather than a sudden leap.
185. The sudden blow knocked two teeth out of his mouth.
186. She had a sudden mental image of herself in a wedding dress.
187. The fortress at the entrance to the village was reduced by a sudden attack.
188. A sudden fall in profits provided a further disincentive to new investors.
189. The sudden noise made him release his hold on her arm.
190. A power failure plunged the whole house into sudden darkness.
191. She was startled by a sudden movement in the shadowy hallway.
192. I have always rested complete faith in your ability to deal with matters of sudden urgency.
193. A sudden flash of lightning lit everything up for a second.
194. The sudden tension on the line told me I had hooked a fish.
195. He had a sudden heart attack while he was on holiday.
196. Some patients don't refer to the discomfort of angina as an ache; rather they describe it as sudden sharp pains.
197. His sudden plunge into the field of international diplomacy is a major surprise.
198. Wind caught the sudden puff of dust and blew it inland.
199. They were surprised by his sudden repudiation of all his former beliefs.
200. I was struck by the sudden realization that I would probably never see her again.
201. He made a sudden movement and frightened the bird away.
202. The band's sudden rise to fame took everyone by surprise.
203. His fame was so sudden that he was unprepared for public life.
204. Firemen are ready at all times for a sudden turnout.
205. A sudden shift in the wind warned of the coming storm.
206. I had a sudden flashback to the time immediately after the war.
207. His sudden decision to retire brought down the curtain on a distinguished career.
208. Her sudden illness put her out of the running in the contest.
209. All of a sudden we heard an almighty crash from the kitchen.
210. She made a sudden appearance just as we were about to leave.
More similar words: all of a sudden, buddy, added, a good deal, a good deal of, deny, dense, denial, wooden, evident, student, density, incident, identify, resident, evidence, tendency, identity, president, diffident, identical, residence, dependent, confident, presidency, by accident, respondent, residential, schadenfreude, presidential.