Commonly Confused Words: This list of words that are often confused, from St. Peter’s College Library, can help you choose the right word.
Which vs. that: This page explains restrictive and non-restrictive sentences, illustrating when to use “which” and when to use “that.”
Vocabulary.com: A web site that teaches English vocabulary through games.
Dictionary by Merriam-Webster: A comprehensive dictionary
Roget’s Thesaurus: Roget’s II: The New Thesaurus
Useful Linking Words and Phrases: This page contains charts of linking words that can be used to show the relationship between ideas in your paper (e.g., emphasis, addition, contrast, cause-effect, etc.). Transition Words provides similar information in a slightly different format.
Powerful Verbs for Weaving in Essays: This handout provides lists of verbs that can be used to provide variety in your writing and connect ideas precisely and concisely.