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AltF Lexicon has six word tools: an anagram solver, a word unscrambler, a syllable counter, a rhyme finder, a crossword pattern search and a Scrabble rack solver. All six search the same 147,478-entry dictionary, and every answer links to that word's full entry.
AltF Lexicon holds 147,478 entries: definitions and semantic relations from Princeton University’s WordNet, pronunciation and stress from the CMU Pronouncing Dictionary, and a commonness band derived from how often each word appears in a large corpus of everyday English.
The five letter-and-sound tools work from a reduced index of 77,636 of those entries — the ones whose headword is a single unbroken run of a–z, between 1 and 31 letters long. Phrases like q fever, hyphenated compounds and anything carrying a digit or an apostrophe are left out, because none of them can be played on a rack or written into a crossword grid. Those 77,636 words collapse into 72,807 distinct letter sets, which is what makes an anagram lookup a single index hit rather than a scan.
Every answer carries its commonness band as a five-segment meter, because a word that technically exists and a word you can actually use are different things, and the meter is the fastest way to tell them apart.
Definitions and word relations come from Princeton University’s WordNet; pronunciation, stress and rhyme keys come from the CMU Pronouncing Dictionary; commonness bands come from a frequency corpus of everyday English. Scrabble tile values are the standard English distribution and are not licensed from Hasbro or Mattel. Full sources and licences.