"Overmagnitude" is a rarely used word and its spelling can be a bit tricky. The word is pronounced as /ˌoʊvərmæɡnɪtjuːd/. The first part of the word is "over", which is spelled as it sounds. The second part of the word is "magnitude", which is spelled as /mæɡnɪtjuːd/. The "o" sound is pronounced like "ah", not "oh". The "g" is pronounced as "j" and there is a silent "e" at the end of the word. Overall, "overmagnitude" is a complex word with an interesting spelling.