Student or Learner
Is the following part correct?
What word has the same meaning as( or with?) A?
What word has a( or the?) similar meaning as( or with?) A?
I think A and B have a similar meaning.
I think in meaning, A and B imply the same.
* 'The same ... as'. (I'm sure you'll find many counterexamples on the Internet; so what A: So it's a common mistake.)
Your third sentence is OK; your fourth is pleonastic.
PS *This was addressed to the OP, of course.