* Kooth is not a recognized word in any major English dictionary. It might be a misspelling or a word from a specific dialect or language.
* Couth is a somewhat archaic word that means "refined, polite, or well-bred." While it is a valid word, it's not commonly used in modern English.
If you encountered these words, it's best to clarify their context or the source where you found them to understand their intended meaning.