The words halves, haves sound the same but have different meanings and spellings. Why do halves, haves sound the same even though they are completely different words?
The answer is simple: halves, haves are homophones of the English language.
Plural of half.
The wealthy or privileged, contrasted to those who are poor or deprived: the have nots.
Third-person singular simple present indicative form of have.
Definitions from The American Heritage® Dictionary of the English Language, 4th Edition, from Wiktionary, Creative Commons Attribution/Share-Alike License and Wordnik.
Homophones (literally "same sound") are usually defined as words that share the same pronunciation, regardless of how they are spelled.