M
API Matrix

Words API

⭐ Beginner's Pick Dictionaries / API Key Intermediate HTTPS
Varies by plan (check documentation)
77 Score
Grade B
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Overview

Words API gives you instant access to definitions, synonyms, antonyms, examples, and more for over 150,000 English words via a simple REST interface. You can look up a word and retrieve rich linguistic data in a single GET request. It is a great tool for building vocabulary apps, writing assistants, or educational tools.

💡

Beginner Tip

Start with a simple word lookup like GET /words/{word} to retrieve definitions and synonyms — no complex setup needed beyond your API key in the X-RapidAPI-Key header.

Available Data

word definitions
pronunciation
synonyms and antonyms
example sentences
part of speech

Example Response

JSON Response 
{
  "word": "serendipity",
  "phonetic": "/ˌsɛr.ənˈdɪp.ɪ.ti/",
  "meanings": [
    {
      "partOfSpeech": "noun",
      "definition": "The occurrence of events by chance in a happy way"
    }
  ],
  "synonyms": [
    "luck",
    "fortune",
    "chance"
  ]
}

Field Reference

word The word that was looked up.
results Array of result objects, each containing a definition and related data.
results[].definition A single definition of the word.
results[].partOfSpeech Grammatical category such as noun, verb, or adjective.
results[].synonyms List of synonyms for this particular meaning of the word.
results[].examples Example sentences illustrating how the word is used in context.

Implementation Example 

// ⚠️ Note: This URL may be a documentation page. Check official docs for actual API endpoint.
const url = "https://www.wordsapi.com/docs/";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

401 Unauthorized Missing or invalid RapidAPI key in the request header.
✓ Add the X-RapidAPI-Key and X-RapidAPI-Host headers with your valid key from RapidAPI.
404 Not Found The word you searched for is not in the database.
✓ Double-check the spelling and try a more common word. The API covers standard dictionary words.
429 Too Many Requests You have exceeded your plan's monthly request quota.
✓ Monitor your usage on the RapidAPI dashboard and upgrade your plan if needed.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 12/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS UNKNOWN
Category Dictionaries
Difficulty Intermediate
Verified: 2026-04-04

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