Link: http://www.confusingwords.com/index.php

The word processer giveth; the word processer taketh away. In 1986, Stanford Professor Andrea Lunsford analysed thousands of examples of student writing to identify the most common errors found there. Twenty years on, she repeated the research and discovered significant differences. Prof. Lundsford explains:

"First, with the help of technology, spelling errors have dramatically declined. But the study also found that wrong-word errors--for example, the kind that result when a student spells definitely incor- rectly and allows a spell-checker to change it to defiantly--are the new number one error. "

For anyone who's ever confused affect with effect, flaunt with flout, or monkish with monastic, Confusing Words is a website containing 3210 words that are troublesome to readers and writers. Words are grouped according to the way they are most often confused or misused. Some of these words are homonyms (words that sound alike but are spelled differently) and some are just commonly confused.