The words bused, bussed, bust sound the same but have different meanings and spellings. Why do bused, bussed, bust sound the same even though they are completely different words?
The answer is simple: bused, bussed, bust are homophones of the English language.
Simple past tense and past participle of bus.
Simple past tense and past participle of bus: alternative spelling of bused.
Simple past tense and past participle of buss.
A sculpture representing a person's head, shoulders, and upper chest.
A woman's bosom.
The human chest.
Slang To smash or break, especially forcefully: "Mr. Luger worked it with a rake, busting up the big clods, making a flat brown table” ( Garrison Keillor).
Definitions from Wiktionary, Creative Commons Attribution/Share-Alike License, 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.