Top Related Words API alternatives in 2025

Top Related Words API Alternatives in 2025

As the demand for natural language processing and text analysis continues to grow, developers are increasingly seeking robust APIs to enhance their applications. One such API is the Related Words API, which retrieves related words and their associations, including synonyms, antonyms, and other relationships. However, there are several alternatives available that offer unique features and capabilities. In this blog post, we will explore the best alternatives to the Related Words API in 2025, detailing their key features, pricing, pros and cons, ideal use cases, and how they differ from the Related Words API.

1. Word Association API

The Word Association API provides a powerful tool for retrieving synonyms and related words based on semantic relationships. This API is particularly useful for applications that require understanding the context of words.

Key Features and Capabilities

Get Word Association: This feature allows users to retrieve word associations along with a semantic distance score. When a stimulus word is provided, the API returns an array of associated words, ranked by their relevance.

{
  "entry": "airplane",
  "request": "airplane",
  "response": {
    "airplane": 1
  },
  "associations": "plane, aircraft, terminal, airliner, hangar, airport",
  "associations_array": ["plane", "aircraft", "terminal", "airliner", "hangar", "airport"],
  "associations_scored": {
    "plane": 0.487,
    "aircraft": 0.563
  }
}

This response structure provides developers with a clear understanding of the associations related to the input word, allowing for effective integration into applications.

Pros and Cons

Pros: The Word Association API excels in providing contextually relevant words, making it ideal for applications focused on semantic understanding.

Cons: It may not provide as extensive a list of synonyms as the Related Words API.

Ideal Use Cases

This API is perfect for developing paraphrasing tools, enhancing grammar checkers, and improving natural language processing applications.

How It Differs from Related Words API

While the Related Words API focuses on a broader range of relationships, the Word Association API emphasizes semantic connections, making it more suitable for context-driven applications.

2. Synonyms API

The Synonyms API is designed to provide synonyms for both English and Portuguese words, making it a versatile tool for writers and translators.

Key Features and Capabilities

Get Synonyms: This feature allows users to input a word and receive a list of synonyms in the chosen language. The API returns a string with synonyms separated by commas, which can be easily parsed in any programming language.

'flat','level','flatbottom','flush','justified'

This simple response format allows developers to quickly integrate synonym retrieval into their applications.

Pros and Cons

Pros: The Synonyms API supports both English and Portuguese, making it a valuable resource for bilingual applications.

Cons: It may lack the depth of contextual relationships found in the Related Words API.

Ideal Use Cases

This API is ideal for enhancing writing style, aiding translation projects, and expanding vocabulary for language learners.

How It Differs from Related Words API

The Synonyms API focuses solely on synonyms, while the Related Words API provides a wider range of word relationships, including antonyms and contextual associations.

3. Dictionary Plus API

The Dictionary Plus API allows users to look up words and retrieve collocations, which are words commonly found in conjunction with the specified word.

Key Features and Capabilities

Get Collocations: This feature enables users to enter a word and receive a list of collocations along with definitions and examples of usage. This is particularly useful for language learners and writers looking to improve their vocabulary.

[{"id":2906736,"collocation":"so long","relation":"Adj:mod:Adv","pos":"Adj","examples":["Why on earth do you sit here so long?"]}]

The response provides a comprehensive understanding of how words are used in context, which is invaluable for language education.

Pros and Cons

Pros: The Dictionary Plus API offers rich contextual information, making it an excellent resource for language learners.

Cons: It may not provide as extensive a range of synonyms as the Related Words API.

Ideal Use Cases

This API is perfect for language learning applications, writing tools, and any application that requires a deeper understanding of word usage.

How It Differs from Related Words API

The Dictionary Plus API focuses on collocations and usage examples, while the Related Words API provides a broader range of word relationships.

4. Synonyms And Antonyms API

The Synonyms And Antonyms API allows developers to access a database of synonyms and antonyms for a given word in English.

Key Features and Capabilities

Fetch Synonyms And Antonyms: This feature allows developers to search for a specific word and retrieve a list of its synonyms and antonyms. The API returns a JSON object containing the requested data.

{"word": "happy", "synonyms": ["joyful", "cheerful"], "antonyms": ["sad", "unhappy"]}

This response structure is straightforward and easy to implement in applications.

Pros and Cons

Pros: The Synonyms And Antonyms API provides a clear and concise way to access both synonyms and antonyms.

Cons: It may not offer the same depth of contextual relationships as the Related Words API.

Ideal Use Cases

This API is ideal for vocabulary-building applications, enhancing language learning tools, and improving text analysis algorithms.

How It Differs from Related Words API

The Synonyms And Antonyms API focuses specifically on synonyms and antonyms, while the Related Words API provides a wider range of word relationships.

5. English Vocabulary API

The English Vocabulary API provides an extensive lookup for any word, offering definitions, synonyms, antonyms, pronunciations, and usage examples.

Key Features and Capabilities

Analyze: This feature allows users to pass a word and receive comprehensive information, including definitions, antonyms, synonyms, and usage examples.

{"entries":[{"entry":"branding","interpretations":[{"lemma":"brand","partOfSpeech":"verb","senses":[{"definition":"To burn the flesh with a hot iron."}]}]}

This detailed response structure provides developers with a wealth of information to enhance their applications.

Pros and Cons

Pros: The English Vocabulary API offers a rich dataset, making it ideal for educational applications.

Cons: It may be more complex to implement due to the extensive data provided.

Ideal Use Cases

This API is perfect for creating educational tools for English learners, dictionary applications, and enhancing language processing software.

How It Differs from Related Words API

The English Vocabulary API provides a more comprehensive dataset, including definitions and usage examples, while the Related Words API focuses on word relationships.

Conclusion

In conclusion, while the Related Words API is a powerful tool for retrieving word associations, there are several alternatives available that cater to different needs. The Word Association API excels in semantic understanding, the Synonyms API offers bilingual support, the Dictionary Plus API provides contextual collocations, the Synonyms And Antonyms API focuses on direct word relationships, and the English Vocabulary API delivers a comprehensive dataset for educational purposes. Depending on your specific requirements, one of these alternatives may serve as the best fit for your application in 2025.