Is the word woman a pronoun?

No, the Word 'woman' is a noun, a Word for a female human; a Word for a person.

A pronoun is a Word that takes the place of a noun in a sentence.

The pronouns that take the place of the noun 'woman' are she as a subject and 'her' as an object in a sentence.

Example:

A woman left a shopping bag on the bus. Sheknocked on the door and asked a passenger to hand it to her.