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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241. The sudden collapse of the business led to allegations of corrupt deals.
242. The boxer turned aside the sudden blow with his left arm.
243. There was a sudden influx of household electric products onto the market.
244. The sudden appearance of a few bags of rice could start a riot.
245. A sudden attack of typhoid cut him off in the prime of his life.
246. His sudden death came as a bolt from the blue.
247. The troopers followed behind, every muscle tensed for the sudden gunfire.
248. With a sudden burst of energy, he ran to the top of the hill.
249. A sudden drop on Wall Street can set off a chain reaction in other financial markets.
250. A sudden drop in supplies of certain chemicals could knock the bottom out of the engineering industry.
251. She switched on the light, wincing at the sudden brightness.
252. All my plans were upset by the sudden change in weather.
253. The sudden loss of his money had made him desperate.
254. I had my first cigarette for a year and felt a sudden rush .
255. A sudden breeze sent motes of dust dancing in the air.
256. Half the fruit crop was frozen out in the sudden severe autumn.
257. He jinked left, then right[sentencedict.com], throwing the plane into steep and sudden turns.
258. Detectives have been left scratching their heads over the stolen painting's sudden reappearance.
259. The sudden fall in the value of the dollar has puzzled financial experts.
260. All of a sudden someone grabbed me around the neck.
261. Her music alternates moments of sudden quiet with moments of dramatic intensity.
262. Reg is being very nice all of a sudden. What's his game?
263. "I think I'll try a hypnotist(http://Sentencedict.com)," I said with sudden resolution.
264. News of the general's sudden death was not published for several days.
265. His sudden departure demonstrates that he's unreliable/how unreliable he is.
266. If you have a sudden loss of cabin pressure at 20 000 feet, passengers will become torpid and then lose consciousness.
267. I lived in terror of her sudden caprices and moods.
268. Her sudden withdrawal from the championship caused a lot of press speculation about her health.
269. She felt the sudden sweet release of her own tears.
270. The sudden appearance of a security guard caused them to drop the money and run.
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.