Synonym: conundrum, enigma, issue, mystery, perplexity, puzzle, question. Antonym: solution. Similar words: probably, robot, oblivious, obligation, lemon, element, dilemma, implement. Meaning: ['prɑbləm /'prɒ-] 
n. 1. a state of difficulty that needs to be resolved 2. a source of difficulty 3. a question raised for consideration or solution.
n. 1. a state of difficulty that needs to be resolved 2. a source of difficulty 3. a question raised for consideration or solution. 
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181 The basic lack of government funding is at the core of the problem.
182 Aerial pollution is a problem that should be solved quickly.
183 Money continues to be a problem but aside from that we're all well.
184 We want an acknowledgement of the existence of the problem.
185 It's only a tiny minority of people who are causing the problem.
186 To stop a problem you have to understand its underlying causes.
187 It's easy to be flippant, but we have a serious problem to deal with here.
188 There are a number of possible remedies to this problem.
189 Attempts are being made to solve the problem of waste disposal.
190 The government is proclaiming a carrot-and-stick approach to the problem.
191 People tend to think that the problem will never affect them.sentencedict.com/problem.html
192 The mayor's treatment of the problem satisfied both sides in the dispute.
193 It was a petty problem and they soon solved it.
194 Lack of resources has been a perennial problem since the beginning.
195 She appealed to his mastery for help in solving her problem.
196 She felt she had looked at the problem from every aspect.
197 He happened upon the perfect solution to the problem just as he was about to give up his research.
198 What is/lies at the root of the problem is their lack of interest.
199 He assured us of his ability to solve the problem.
200 Critics of the scheme have said that it will not solve the problem of teenage crime.
201 The baby was born with a heart problem and only survived for a few hours.
202 The problem with the book is that it sometimes descends into portentous philosophizing.
203 You can't just look at it in terms of the immediate problem. You've got to see it in a wider context.
204 It's a nice table! The only problem is it's a bit too big for our room.
205 The members of the committee agreed to press for the conference to deal with the problem.
206 Assuring the patient that she has a real and not imaginary problem is the first step.
207 This sort of problem is quite common. / These sorts of problems are quite common.
208 Is there a problem?
209 I ran up against the problem of getting taken seriously long before I became a writer.
210 I'm afraid that problem is beyond/outside the scope of my lecture.
More similar words: probably, robot, oblivious, obligation, lemon, element, dilemma, implement, settlement, elementary, finite element, implementation, pro, able, table, cable, bless, blend, Bible, bubble, enable, unable, marble, double, foible, prompt, be able to, visible, voluble, stumble.