If referring to the function of a pronoun:
* Substitute
* Replacement
* Stand-in
* Reference word
If referring to the type of pronoun:
* Personal pronoun (e.g., I, you, he, she, it, we, they)
* Possessive pronoun (e.g., mine, yours, his, hers, its, ours, theirs)
* Reflexive pronoun (e.g., myself, yourself, himself, herself, itself, ourselves, yourselves, themselves)
* Demonstrative pronoun (e.g., this, that, these, those)
* Interrogative pronoun (e.g., who, whom, whose, what, which)
* Relative pronoun (e.g., who, whom, whose, which, that)
It's important to note that these alternatives might not always be appropriate depending on the context.
It's generally best to use the word "pronoun" unless you are specifically discussing a particular type of pronoun.