The word 'unradical' represents an absence of extremism or radicalism. In this context, antonyms for unradical include words such as extreme, radical, and revolutionary. These words represent viewpoints that go beyond the norm of standard opinions and beliefs, often leading to controversy and unrest. On the other hand, synonyms for 'unradical' include moderate, conservative, traditional, and conventional. These words convey a sense of stability, predictability, and balance, which can be beneficial in certain contexts, such as in politics or social issues. In conclusion, antonyms of unradical can describe both positive and negative extremes of opinions and beliefs.