- AsifSound vs. Spelling - American Dictionary - Spelling glossary indexed by its abstract grouping pronunciation (=Asifsound). AsifSound consists of 12 sound symbols. This is made from CMU Pronouncing Dictionary.
- Roger's Reference - A Complete Homonym and Homophone Dictionary - Dictionary of words that are phonetically identical but which have different meanings. Now includes over 5000 homonyms and homophones, with meanings and cross-references.
- The CMU Pronouncing Dictionary - A machine-readable pronunciation dictionary for North American English that contains over 100,000 words and their transcriptions.
