Example : You are confusing me with the other candidate.
I mistook her for the secretary.

Synonyms : confound

Example : These questions confuse even the experts.
This question completely threw me.
This question befuddled even the teacher.

Synonyms : bedevil, befuddle, confound, discombobulate, fox, fuddle, throw

Example : The constant attention of the young man confused her.

Synonyms : disconcert, flurry, put off

Example : She jumbles the words when she is supposed to write a sentence.

Synonyms : jumble, mix up

Example : Her remarks confused the debate.
Their words obnubilate their intentions.

Synonyms : blur, obnubilate, obscure