What's the difference between possessive nouns and possessive pronouns?

Are they the same

No.

Possessive nouns use an apostrophe and an s.

boy's, boys', children's, woman's, uncle's, uncles'

Possessive pronouns do not have an apostrophe.

my, mine, your, ours, its, his, etc.

No, possessive nouns and possessive pronouns are not the same, although they both show ownership or possession.

A possessive noun is used to show that something belongs to someone or something. It is formed by adding an apostrophe and an "s" ('s) to the end of a noun. For example, "Mark's car" indicates that the car belongs to Mark.

On the other hand, possessive pronouns are used to replace a noun and show ownership or possession. They replace the noun and indicate who owns or possesses something. Some common possessive pronouns are "mine," "yours," "hers," "his," "ours," and "theirs," among others. For example, instead of saying "The book is mine," you can use the possessive pronoun "Mine" to express ownership.

To identify whether a word is a possessive noun or a possessive pronoun, you can look for the presence of an apostrophe and the letter "s." If they are present, it is likely a possessive noun. If there is no noun and the word is used to show ownership by itself, it is likely a possessive pronoun.