In most cases yes, replacing it with nominally more current than it needs is usually ok. The difference is that there is some thevenin impedance in the wall wart. So measured with no load it might be 14V and with a 1A load it might be 12.2 or something (I am just guessing) since most of these arent regulated. The voltage at 1A will probably be slightly different than the original adapter. However, you need to check the polarity of the adapter, some are tip negative, while others are tip positive.