I know they have the same meaning. But I'm wondering if there is any difference between them, like in some cases we can only use one of them?
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closed as general reference by Mehper C. Palavuzlar, Jasper Loy, Irene, TimLymington, RegDwigнt♦ Dec 27 '11 at 14:09
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.
Despite @Irene's suggestion to check a dictionary, I find it hard to put the difference into words. The easiest might be to look at antonyms:
Sorry this isn't a complete answer (and those certainly aren't complete definitions), hope it helps anyway.