The "just happens to include" and "it kinda sounded cool" arguments frequently lose. If consumers are being confused or are quite likely to be confused or deceived, you have a problem. The commercial effect trumps what somebody intended.
Think what buying products would be like otherwise. "Yeah, I know the market place is utterly confused into thinking I`m selling ROLEX watches but I`m really selling ROLUX watches. Even though consumers think the watches are coming from the same source, I still get to keep on selling my ROLUX watches because, after all, I did not INTEND to deceive anybody." Intent loses. Effect wins.
If you start selling an MP3 player and call the MP3 player an "i-pud," APPLE will be all over you for trying to capitalize on their i-pod brand. What did you INTEND with the name i-pud? Who cares what you sincerely intended! Certainly not the courts.