When it comes to expressing the idea of "never said goodbye," there are several synonyms that people can use to convey similar emotions or feelings. These synonyms depend on the situation or context in which they are used. Some of the synonyms for "never said goodbye" include departed without farewell, left without notice, disappeared without a trace, parted without a word, absented without leave, vanished without saying a word, left without a proper goodbye, gone without farewell, and exited without a goodbye. All of these synonyms can be used interchangeably with "never said goodbye," depending on their context. Ultimately, the most appropriate synonym to use is determined by the speaker's mood, tone and purpose.