Yeah, you would be asking for a lawsuit. The word is not registered as a trademark. But it's automatically copyrighted as a published work based on it being a song title on his album. Basically, he can prove that he used the word in commerce and your usage is infringing by creating confusion. As Station mentioned, the fact that it is a made up word makes it that much easier for him to protect. Even without a registered trademark, album sales can potentially result in common law trademark.