Online Homonym Dictionary
Alan Cooper's Homonym List
This list was compiled with a true appreciation for "the prime numbers of the English language.".
Homonym / Homophone Dictionary
Roger's Reference - A Complete Set Of Homonym / Homophone Dictionary And Word List!
An English Homophone Dictionary
Homophones are words of the same language that are pronounced alike even if they differ in spelling, meaning, or origin, such as "pair" and "pear".