Antonyms for the term "middle of the road" can encompass a vast array of words that describe different extremes. Some possible antonyms for this term include words such as radical, extreme, uncompromising, partisan, dogmatic, and polarizing. Other antonyms could include words like unconventional, nonconformist, unconventional, independent, and bold. Essentially, any word that conveys a strong or opposite position from the term "middle of the road" could be considered an antonym. Depending on the context in which it is used, the choice of antonym may vary. For instance, in a political context, antonyms such as radical or partisan might be appropriate, while in a business context, words like unconventional or bold could work better.