The word "HURS" is not a commonly used word in English, but it is a valid word. The spelling of this word can be explained using IPA phonetic transcription. The pronunciation of "HURS" is /hʌrz/. The first sound is the "h" which is pronounced as /h/, followed by the vowel sound "ʌ" which is pronounced as /ʌ/. The final sound is "z" which is pronounced as /z/. Therefore, the correct spelling of the word "HURS" is as it is spelled.