Discover Words with Opposite Meanings

Antonym API.

Retrieve a list of antonyms (words with opposite meanings) for any English word. Perfect for writing tools, vocabulary builders, educational apps, and natural language processing applications.

Free tier, no card< 200ms responses99.9% uptime SLA
GET/v1/antonymlive
Response200 OK · sample
{
  "status": "ok",
  "error": null,
  "data": {
    "word": "happy",
    "language": "en",
    "antonyms": [
      "sad",
      "unhappy",
      "miserable",
      "depressed",
      "glum"
    ]
  }
}
Sample response · verify to run one live call, no signup
Integrates with your favorite tools
LangChainn8nZapierMakePipedreamPower AutomatePostman

Antonym API

Retrieve a list of antonyms (words with opposite meanings) for any English word. Perfect for writing tools, vocabulary builders, educational apps, and natural language processing applications.

  • Find opposite words instantly
  • Multiple antonyms per word
  • Comprehensive English vocabulary
  • Fast responses for real-time apps
  1. 1

    Send one request

    A single authenticated GET with the location you care about — no SDK required.

    GET /v1/antonym?query=
    x-api-key: your_key
  2. 2

    We do the aggregation

    Each request pulls from multiple upstream sources and computes the derived fields for you.

  3. 3

    Get clean JSON back

    One structured object, typically under 200 ms — ready to render.

    { word, language, antonyms, }

Everything in a single call.

/v1/antonymapplication/json
word"happy"
language"en"
antonymsarray of 5

What developers build with it.

Real applications shipping on this endpoint today — each with the numbers that made it worth wiring up.

See every use case

Call it in your language.

Copy a working request, or install a typed SDK. Same endpoint, same key.

const res = await fetch("https://api.apiverve.com/v1/antonym?word=happy", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

One subscription, the whole discover words with opposite meanings stack.

Every related API ships with your key — no separate plans, no extra keys, one bill.

See pricing
8APIs in this bundle
99.9%uptime SLA
The bundle
antonymYou’re herethesaurusdictionarywordrhymeswordpronunciationspellcheckersentimentanalysislanguagedetector

Wire it into the tools you already run.

Ready-made recipes for Zapier, Make, and n8n — trigger on an event, and the data lands where your team works.

Google Sheets
Antonym Lookup in Google Sheets
WhenNew row added in Google Sheets
ThenFetch antonyms for word in row → write antonyms array to adjacent column
Slack
Antonym Lookup Bot in Slack
WhenNew message posted in Slack channel
ThenFetch antonyms for mentioned word → reply with word and antonyms list
Airtable
Antonym Database in Airtable
WhenNew record created in Airtable
ThenFetch antonyms for word field → update record with antonyms array
Notion
Antonym Reference in Notion
WhenNew page created in Notion
ThenFetch antonyms for word property → add antonyms list to page content
Salesforce
Sentiment Contrast in Salesforce Cases
WhenNew case created in Salesforce
ThenFetch antonyms for sentiment keywords → add antonyms to case notes for context
GitHub
Documentation Word Clarity Check on GitHub
WhenNew pull request opened in GitHub
ThenFetch antonyms for ambiguous terms in PR → add comment with word and antonyms for clarity
Browse all integrations

Questions about the API

How many antonyms are returned?
The API returns all known antonyms for a word, typically between 1-15 depending on the word. Common words tend to have more antonyms.
What if a word has no antonyms?
Words without clear opposites (like proper nouns or highly specific terms) may return an empty array or fewer results.
Does it handle different word forms?
The API works best with base word forms. For "running," try "run." Results may vary for inflected forms.
Are the antonyms ranked by relevance?
Yes, antonyms are generally ordered with the most direct opposites first, followed by less common alternatives.
Does it support phrases or idioms?
The API is optimized for single words. For multi-word expressions, results may be limited.
What language is supported?
Currently English only. The database covers standard American and British English vocabulary.

Start building with the Antonym API. Free tier, no card required — your key is live in minutes.

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