General synonyms:
* Deceive
* Delude
* Betray
* Hoodwink
* Trick
* Duplicitous
* Misinform
* Disorient
* Confuse
* Manipulate
* Swindle
More specific synonyms:
* Misrepresent: To give a false or inaccurate account of something.
* Misguide: To lead someone in the wrong direction, either physically or figuratively.
* Misdirect: To lead someone to the wrong place or to the wrong conclusion.
* Misinterpret: To understand something incorrectly.
* Misjudge: To form a wrong opinion about someone or something.
The best synonym for "mislead" will depend on the context of your writing. Consider the specific situation and the intended meaning to choose the most appropriate word.