Word History Websites
Grammarphobia: Grammar, etymology, linguistics, usage, and more
Grammar, etymology, linguistics, usage, and more from the bestselling language writers Patricia T. O'Conner and Stewart Kellerman
209,531 
$ 24,300.00
Make Your English Easy - Memory Tricks for Words, SSC Wordlist, Bank Exams Wordlist, SAT, GRE, TOEFL, History and Origin Of Words
VocabEasy
468,806 $ 5,040.00
The Cognātarium
The Cognatarium, by Daniel M. Short. A lexicon of English words related by common roots, i.e. cognates.
1,575,306 $ 480.00