Yes Word of God have power to cancel the word of Satan. In Luke 4 we see Spirit took Jesus to desert, where Satan tempted Him. Jesus overcame this temptation by cancelling word of Satan with word of God. Jesus replied Satan by saying it's written (3 times).

     If Satan also speak something against you just cancel it with Word of God. Don't sit ideal but reply Him immediately with the right Verse. It will cancel His Power, His Authority and His Claim over You and Yours and He have to flee. 

     Don't think do it right now victory is yours in Jesus victorious name! Amen!