Merriam-Webster is the American dictionary. Word Orb is the developer dictionary.
Feature Comparison
Feature
Word Orb
Merriam-Webster API
Languages
47 + native script
English + Spanish
Educational Content
162K words + 226K lessons + 21.9K quizzes
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API Response Time
<50ms edge
~100ms
Knowledge Graph
30K connections
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Quizzes & Assessment
21,900 assessments
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Structured Lessons
226,000 blocks
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Pronunciation Audio
240K MP3 files
WAV files
Search
Prefix + fuzzy + definition + autocomplete
Suggestions on miss
Batch Requests
Up to 50 words
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Pricing
Free 500/day, $29-$499/mo
Free (2 keys, 1K/day)
MCP Agent Support
12 tools
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Why Developers Choose Word Orb
One API returns all age tones — MW needs separate Learner's and Collegiate keys.
47 languages in every response — MW gives English and Spanish.
Lessons and quizzes for complete learning experiences, not just lookups.
Modern JSON with consistent schemas — MW's XML-legacy format needs careful parsing.
MCP server for AI agents — MW has no agent integration.
Fair comparison: Merriam-Webster has unmatched American English authority and is the legal spelling standard in US courts.
K
Kelly, your AI language teacher, powers every Word Orb response. Curated by educators. Gender-equitable. Age-appropriate. No competitor offers this depth of pedagogical structure in an API.