“Synonyms of bunk” means we are looking for words that have a similar meaning to “bunk”.
If we consider “bunk” in the sense of a bed or sleeping place, some synonyms could be “cot” and “berth”. A cot is a narrow bed, often portable. For example, “He slept on a cot in the tent.” A berth is a sleeping place on a ship or train. For instance, “The passenger found his berth and settled in for the journey.”
When “bunk” is used to mean nonsense or false talk, synonyms could be “nonsense”, “rubbish”, and “hogwash”. “Nonsense” implies something that is senseless or without meaning. For example, “What he said was complete nonsense.” “Rubbish” suggests something worthless or untrue. “His argument was just rubbish.” “Hogwash” is a more colorful term for untrue or foolish talk. “That excuse is just hogwash.”
In conclusion, depending on the meaning of “bunk”, words like cot/berth for a sleeping place and nonsense/rubbish/hogwash for false talk can be considered synonyms, each adding a different nuance to the concept of “bunk”.