"word ladder" meaning in English

{
  "forms": [
    {
      "form": "word ladders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "word ladder (plural word ladders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A kind of puzzle in which one word must be transformed into another specified word of the same length by changing one letter at a time, each step yielding a valid intermediate word, as in lead → load → goad → gold."
      ],
      "id": "en-word_ladder-en-noun-6oQJ4vjx",
      "links": [
        [
          "puzzle",
          "puzzle"
        ],
        [
          "word",
          "word"
        ]
      ],
      "related": [
        {
          "word": "word golf"
        }
      ],
      "synonyms": [
        {
          "word": "doublet"
        },
        {
          "word": "laddergram"
        }
      ]
    }
  ],
  "word": "word ladder"
}

{
  "forms": [
    {
      "form": "word ladders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "word ladder (plural word ladders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "word golf"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns"
      ],
      "glosses": [
        "A kind of puzzle in which one word must be transformed into another specified word of the same length by changing one letter at a time, each step yielding a valid intermediate word, as in lead → load → goad → gold."
      ],
      "links": [
        [
          "puzzle",
          "puzzle"
        ],
        [
          "word",
          "word"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "doublet"
    },
    {
      "word": "laddergram"
    }
  ],
  "word": "word ladder"
}