Word Tools – Synonyms & Antonyms

Choose this endpoint when you need both synonyms and antonyms together with relevance scores and parts-of-speech labels in a single call. Prefer it over a generic thesaurus scrape when structured, machine-readable output and per-word grammar tagging are required — e.g. for writing assistants, NLP pipelines, vocabulary tools, or quiz generators.

• Word not found in the lexical database — empty synonym/antonym arrays returned
• Invalid or missing 'word' query parameter — request fails with a 4xx error
• Limit parameter out of range (must be 1–50) — may return default 20 or an error
• Service operating in degraded mode — partial results with a degraded flag set to true
• Network or upstream timeout — no response or 5xx error