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?
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.