MrJerseyGuy - Your sub may have been emotionally abused with those words at some time. That she’s confided she doesn’t like those words sounds to me like she trusts you.

The response you get will differ every time. The “c” word has different meanings:

You cunts are all alike!
Ummmm, I love the taste of your sweet cunt.
C’mere and rub that cunt on me.
Whadda cunt!

Personally, I reserve the title of “cunt” for women that I dislike and nothing will change the way I feel about them. ..... 'cause they're cunts!

As for something to say, why not compliment her from time to time with something along the lines of how happy her cunt makes you. As for slut and whore try setting boundaries for the usage - talk to her about the words that bother her and look her in the eye and assure her they aren’t intended to hurt her. I should think more on the subject before saying anything but there ARE things I’m perfectly comfortable saying (and hearing) in the bedroom that are not part of my vocabulary anywhere else.