HELP, PLEASE. THANK YOU!

Hi! I would need some help please…
Does Amazon’s system differentiate between singular and plural words? I’ve been trying to use ChatGPT to eliminate only the second occurrence of a word, whether it’s in singular or plural form. I’m not interested in removing misspellings, only plurals that end with ‘S,’ not those ending in ‘IES’ or plurals with spelling changes. For instance, in the list ‘Cat, Cats, Man, Men, Accessory, Accessories,’ I’d like it to remove ‘Cats’ specifically. I’m not sure if ChatGPT is capable of this.