Index Google  
Writing and Grammar Dictionaries & Thesauri Word tools
Related guide: Dictionaries Crossword Dictionary
RefSeek's guide to the 30 best online dictionaries, thesauri, and definition aggregators. Listings are judged by authority, coverage, usability, and utility. Directory and search engine for acronyms and abbreviations. Find answers to crossword puzzles, anagrams and cryptograms. - Acronyms - Also see: - Crosswords Grammar & Composition    
Extensive resource for writing instruction and advice. Acronym Finder Internet Anagram Server Dictionary of acronyms and abbreviations. Contains over 750,000 definitions. Remarkable, robust anagram lookup service from Wordsmith. - Acronyms - Anagrams
APA Style    
Summary of APA manual. Commonly used to cite sources within the social sciences. Lulu Rhyming Dictionary  |  Also: APA Style Aggregator of definitions, encyclopedia entries, and language translations. Wonderful tool on that returns many rhyming words and phrases. - Aggregator - Rhymes
Automatically generate bibliographies for books, articles, films, and web sites. Cambridge RhymeZone Search multiple dictionaries from Cambridge University Press. Writing tool for poetry, song lyrics, greeting cards, and more. - Rhymes
Chicago Manual of Style    
Outline of bibliographic style most commonly used in the humanities. Computer Definitions WordCount  |  Also: Chicago Manual of Style Featuring 20,000 topics and 2,500 images. Search field at bottom of page. Artistic experiment that presents 86,800 English words, ranked in order of frequency. - Computers
Common Errors in English Usage    
Deals with common spelling mistakes in the English language. Confusing Words Wordle Collection of more than 3,200 often-troublesome words. Java-based word cloud generator. Customizable fonts, layouts, and color schemes. - Dictionary - Collages
Daily Writing Tips    
Blog featuring simple yet effective tips to improve your writing. Write Rhymes Includes definitions from American Heritage, Random House, and Merriam-Webster. Simple online notepad with rhyme suggestions for poets. - Aggregator - Also see: - Rhymes
The Economist Style Guide    
General advice on writing, common errors and clichés, and guidance on vocabulary. Google Dictionary Returns definitions from around the Web. - Aggregator Translation tools
The Elements of Style    
Concentrates on the rules and principles of composition most commonly violated. Investor Words Babel Fish Financial glossary with a comprehensive index of 7,500 definitions. Free online text and web page translation service. Powered by Systran. - Financial
English Grammar 101    
Tutorial instruction for use in various education settings. Dictionary Babylon Concise, easy-to-read definitions from The People's Law Dictionary. Simple, free translation software. Translates in 75 languages. - Legal
Grammar Girl    
Daily blog and podcast. Features quick and dirty tips for better writing. Macmillan Bing Translator British English and American English dictionaries. Free online language translation service powered by Microsoft Machine Translation. - Dictionary  |  Also see: Microsoft Research Blog
Grammar reference materials from the University of Ottawa's Writing Centre. MarketingPower Dictionary Google Translate 4,000 cross-referenced definitions of marketing terms. Google's free online language translation service. Translates text and web pages. - Marketing
MLA Style    
Features brief in-text parenthetical citations keyed to an alphabetical list of works cited. Mathworld Dictionary Reverso  |  Also: Modern Language Association Source of mathematical definitions and concept explanations. Sophisticated translation and word conjugation with audio pronunciations. - Math
OWL, Online Writing Lab    
Writing resources and instructional material for students and teachers. Med Terms Systran Easy-to-understand explanations of more than 16,000 medical terms. Market-leading provider of language translation software products and solutions. - Medical
Technical Report Writing    
NASA manual explaining the fundamentals of writing and reviewing technical reports. Medi Lexicon Search over 200,000 medical terms, ICD-9 codes, hospitals, and more. - Medical  
Using English    
Resources to learn the English language for ESL, EFL, and EAP students and teachers. Merriam Webster Based on the print version of Merriam-Webster's Collegiate Dictionary. - Dictionary  
Web Style Guide    
Sets out basic design and editorial principles for building Web sites. Merriam Webster Visual Dictionary 6,000 full-color images; 20,000 terms with contextual definitions. - Dictionary  
Web Typography    
A guide to the elements of typographic style as applied to the Web. Net Lingo Definitions for thousands of terms in the field of technology and communication. - Technology  
wikiHow: English    
Collaborative, wiki-based guides covering composition, grammar, and vocabulary. OneLook Meta-search tool indexing 13 million words from 1,000 dictionaries. - Also see: OneLook Reverse Dictionary  
  Oxford Compact  
  Oxford's Compact English Dictionary contains 145,000 words and definitions. - Dictionary  
  Roget's Thesaurus  
  Over 17,000 entries. Find synonyms, antonyms, and brief definitions. - Thesaurus  
  The Free Dictionary  
  General and subject dictionaries for financial, legal, and medical terms.  
  Urban Dictionary  
  Dictionary of contemporary American slang. Not appropriate for children. - Slang  
  Visual Thesaurus  
  Displays a unique visualization of connections between words. - Thesaurus  
  WebMD Medical Dictionary  
  Thousands of medical entries from abdomen to zygote. - Medical  
  Dictionary for computer and Internet terms. - Technology  
  Multilingual dictionary and thesaurus written and edited by the public. - Dictionary  
  Word Spy  
  Blog tracking new words and phrases in popular use.  
  Aggregator of definitions, images, and word usage statistics. - Aggregator  
  Definitions, thesaurus entries, spelling, pronunciation, and etymology results. - Aggregator