Clunker is a slang term commonly used to describe an old and worn-out car that is no longer in good condition. There are several synonyms for the word "clunker" that can be used to convey the same meaning. Some of these synonyms include junker, rust bucket, hooptie, beater, and jalopy. Each of these words serves as a colorful descriptor for a vehicle that has seen better days. In some cases, these terms may simply be used for humorous effect, while in other cases they may carry a negative connotation towards an old and unreliable vehicle. Regardless of the context, these synonyms are all effective ways to describe a clunker.