What are a pair of words that spelled the same but have different meanings?

You're looking for homographs, which are words that are spelled the same but have different meanings and sometimes different pronunciations. Here are a few examples:

* Bat (a nocturnal flying mammal) and bat (to hit a ball with a bat)

* Bow (a knot used to tie things) and bow (to bend forward in respect)

* Lead (a heavy metal) and lead (to guide)

* Wind (to turn something by twisting) and wind (moving air)

Let me know if you'd like more examples!