They are but not limited to:taiser, tazar, tazer, tazor, tazzer, c2 taser.

According to Kimberly Bell Citizen Sales and Media Relations and supported by William Bachand, Intellectual Property Counsel the correct spelling is TASER ®, which is the acronym for "Thomas A. Swift's Electric Rifle". 

Mr. Bachand further has explained the use of the incorrect spelling will likely cause consumer confusion, and warns TASER International,Inc. will not hesitate to file an injunction against any persons or companies that are not compliant with trademark guidelines.

If you have any questions about trademark compliance call Erin Duffy, trademark paralegal at 480-905-2063 directly.