on Writing Forward:
Homophones are words that sound the same when pronounced out loud but have different meanings. Homophones such as they’re, there, and there confuse kids, slip past spell check, and pop up all over the place as typos and misspellings.
To make things worse, many homophones have different spellings, which means spell check ignores them, since alternative spellings are correct.
These little devils of the English language give readers headaches and copy editors nightmares, so it’s up to us as writers to learn how to use homophones correctly. If we can do that, we can spread proper homophone spelling and usage to the far corners of the planet.