The spelling of the word "NODIA" follows the basic rules of English phonetics. The letter "N" represents the voiced nasal consonant /n/, followed by the letter "O" which is pronounced as /oʊ/ in the diphthong form. The letter "D" represents the voiced dental consonant /d/ followed by the letter "I" representing the vowel /iː/. Finally, the letter "A" represents the open front unrounded vowel /æ/. The correct pronunciation of "NODIA" is /ˈnoʊdiə/.