Synonyms of rehash
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rearrangeIf you rearrange a meeting or an appointment, you arrange for it to take place at a different time to that originally intended.
• You may cancel or rearrange the appointment.
rejig (informal)If someone rejigs an organization or a piece of work, they arrange or organize it in a different way, in order to improve it.
Thesaurus for rehash from the Collins English Thesaurus
If you describe something as a rehash , you are criticizing it because it repeats old ideas , facts , or themes , though some things have been changed to make it appear new.