Is leather a pronoun

No, the Word 'leather' is a noun, a verb, and an adjective (not a pronoun)

The noun 'leather' is a Word for the processed skin of an animal used to make things.

The verb 'leather' is to apply leather to something.

The adjective 'leather' describes a noun as made of or covered in leather.

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

The pronoun that takes the place of the noun 'leather' is it.

Example: The top of this table is leather. Itgives the table an elegant look.