Use the Big Huge Thesaurus API to get synonyms for words, as well as antonyms, related terms, and similar terms. This is a free, English language thesaurus with over 145,000 words. No API key required if you make fewer than 10,000 calls per day. Version 1 has simple output, and version 2 has enhanced output, including the part of speech and relationships to the submitted word.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.