You can use PATCH to modify the values of existing thesaurus entries. For example, to change the synonym from dig to digi for sample_entry_1, you can execute the PATCH method with the following input:

PATCH /gsadmin/v1/cloud/thesaurus/sample_entry_1

{
  "synonyms": ["digi"],
  "ecr:type": "thesaurus-entry"
}

Note: PATCH is supported only in JSON format.