The antonyms for the word "special agent" include common, ordinary, average, regular, standard, and usual. A special agent is a highly skilled and trained investigator who works under a specific agency or organization to investigate complex cases. In contrast, an ordinary agent does not possess that level of expertise or specialty in investigation. They are usually tasked with routine cases that do not require any specialized knowledge or skills. While a special agent is unique, rare, and distinctive, a regular agent is ordinary, commonplace, and typical. The two words opposite each other in meaning, providing a clear understanding of the level of expertise and skills the agent possesses.