GET some_index/_analyze
{
  "analyzer": "synonym",
  "text" : "cosmos"
}


{
  "tokens": [
    {
      "token": "cosmos",
      "start_offset": 0,
      "end_offset": 6,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "universe",
      "start_offset": 0,
      "end_offset": 6,
      "type": "SYNONYM",
      "position": 0
    }
  ]
}