"Cman" is a colloquial term used to refer to a male companion or friend. However, there are several alternative synonyms that can also be used to describe the same concept. For instance, the term "buddy" is commonly used to denote a close or intimate friend. Similarly, the word "mate" is frequently used in British English to convey the same meaning. Another synonym that could be used for "cman" is "pal" which is an abbreviation for "paladin", which means a friend or comrade who will fight for you. Overall, there are many synonyms that can be used interchangeably with the term "cman" depending on the context and the preference of the speaker.