What phonetic word is used for the letter 'O'?

The phonetic word used for the letter 'O' in the NATO phonetic alphabet is "Oscar." This phonetic alphabet is designed to ensure clarity and avoid confusion when spelling out words over radio or telephone communication, especially in challenging environments. Each letter corresponds to a specific code word that is easily understood, regardless of language or background knowledge.

"Oscar" is clearly recognizable and stands out among a set of similar-sounding letters, making it an effective choice for representing 'O.' The purpose of these phonetic codes is to provide a standardized way to communicate letters, and "Oscar" fits this criteria perfectly, ensuring that listeners can accurately interpret the message being conveyed.