To figure out how to pronounce it, you would need more context:
* Is it a proper noun (a name of a person, place, or thing)? If so, you would need to know the origin or meaning of the name to determine a likely pronunciation.
* Is it a technical term or jargon specific to a certain field? If so, you would need to consult a dictionary or glossary specific to that field.
* Is it a made-up word or a misspelling? If so, you might try to guess the intended pronunciation based on the spelling or its context.
Without more information, it is impossible to provide a definitive pronunciation for "Chaomos."