ESL Web Directory
Dictionaries Thesauri and Reference
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Corpus Linguistics@ (11)
Dialects of English (13)
Etymology and History@ (29)
Links
WordsLike.net - Find Similar Words
Find similar words, synonyms and thesaurus.
Wordspeller ESL Dictionary
Apps and books that locate your word by the way it sounds - phonetically. Misspell and English or Spanish word and instantly find the proper spelling of the word. Spells out words with their suffixes and prefixes and will list other words that sound or are spelled similar to your word.
yourDictionary.com
Links to dozens of language dictionaries online.