There seems to be no word in English that is spelled "nuner". One possible explanation for this spelling would be if someone was trying to spell the word "nun" but added an extra "er" at the end. However, the phonetic transcription of "nun" is /nʌn/ and does not include an "er" sound, which would be transcribed as /ər/. It is important to spell words correctly in order to effectively communicate with others.