The spelling of the word "odlum" is not a commonly known spelling. However, it can be explained using IPA phonetic transcription. The key to the spelling of the word "odlum" lies in its vowel sounds. The ‘o’ is pronounced as the ‘aw’ sound in ‘law’. The ‘d’ is pronounced as the normal ‘d’ sound. The ‘l’ is pronounced as the normal ‘l’ sound. The ‘u’ is pronounced as the short ‘u’ sound in ‘cub’. The ‘m’ is pronounced as the normal ‘m’ sound.