The words aes, ayes, eyes sound the same but have different meanings and spellings. Why do aes, ayes, eyes sound the same even though they are completely different words?
The answer is simple: aes, ayes, eyes are homophones of the English language.
Plural form of a., the name of the letter A.
Plural form of aye.
Plural form of eye.
Third-person singular simple present indicative form of eye.
Definitions 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.