The term "un-commoner" is not very common, as it is a relatively new term coined to describe people who do not belong to the common classes of society. However, there are several words that can be used as synonyms for this term. Words such as "nonconformist," "outsider," "eccentric," "maverick," and "nontraditionalist" are all used to describe someone who does not fit into the usual mold or conform to the norms of society. These individuals are often seen as rebels who challenge the status quo and are not afraid to go against the grain. They are considered unique, innovative, and often inspire others to break free from the constraints of the norm.