In the international radio alphabet, the word "Alpha" represents the letter "A." The international radio alphabet, also known as the NATO phonetic alphabet, is a set of standardized words used to spell out letters over radio or telephone communication to ensure clarity and accuracy. Each word in the alphabet represents a specific letter to avoid confusion or misinterpretation of similar-sounding letters. For example, "Alpha" represents "A," "Bravo" represents "B," "Charlie" represents "C," and so on.