What are words that have same spelling but different meaning?

You're asking for homographs, which are words that are spelled the same but have different meanings and often different pronunciations. Here are some examples:

Different pronunciations:

* bow (to bend at the waist) vs. bow (a weapon used to shoot arrows)

* lead (a heavy metal) vs. lead (to guide or direct)

* tear (a drop of liquid from the eye) vs. tear (to rip)

* wind (moving air) vs. wind (to coil)

* read (to look at and understand written words) vs. read (past tense of "read")

Same pronunciations:

* bat (a nocturnal flying mammal) vs. bat (a piece of equipment used in baseball)

* bass (a type of fish) vs. bass (low-pitched sound)

* minute (a unit of time) vs. minute (very small)

* object (a thing) vs. object (to disagree)

* produce (to create) vs. produce (fruits and vegetables)

This is just a small sampling of homographs. There are many more examples in the English language.