When "whose" refers to possession:
* Who's: This is a contraction of "who is" and is not an antonym of "whose."
* Whom: This is the object form of "who" and is not an antonym of "whose" either.
* No one's: This can be considered an antonym when "whose" indicates possession. For example: "Whose book is this?" "No one's."
* Nobody's: Similar to "no one's," this indicates a lack of possession.
When "whose" refers to something belonging to someone:
* No one's: This is the antonym when "whose" indicates the belonging of something. For example: "Whose car is that?" "No one's."
* It's not anyone's: This emphasizes that it belongs to no specific person.
Important Note: "Whose" itself does not have a direct antonym. It depends on the specific meaning and usage in the sentence.