The words shivaree, shivery sound the same but have different meanings and spellings. Why do shivaree, shivery sound the same even though they are completely different words?
The answer is simple: shivaree, shivery are homophones of the English language.
Midwestern & Western U.S. A noisy mock serenade for newlyweds. Also called regionally charivari, belling, horning, serenade.
Trembling, as from cold or fear.
Causing shivers; chilling.
Easily broken; brittle.
Definitions from The American Heritage® Dictionary of the English Language, 4th Edition and Wordnik.
Homophones (literally "same sound") are usually defined as words that share the same pronunciation, regardless of how they are spelled.