The words bundt, bunt sound the same but have different meanings and spellings. Why do bundt, bunt sound the same even though they are completely different words?
The answer is simple: bundt, bunt are homophones of the English language.
A baking pan with a hollow, circular, raised area in the middle.
Baseball A bunted ball.
A butt with or as if with the head.
Baseball To bat (a pitched ball) by tapping it lightly so that the ball rolls slowly in front of the infielders.
Baseball To cause (a base runner) to advance or (a run) to score by bunting.
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.