The words ante, anti-, auntie, aunty sound the same but have different meanings and spellings. Why do ante, anti-, auntie, aunty sound the same even though they are completely different words?
The answer is simple: ante, anti-, auntie, aunty are homophones of the English language.
Games The stake that each poker player must put into the pool before receiving a hand or before receiving new cards. See Synonyms at bet.
A price to be paid, especially as one's share; cost: "Whether they could actually turn back Soviet policy depended on many factors that Moscow might yet choose to test by upping the ante” ( Foreign Affairs).
Games To put (one's stake) into the pool in poker.
To pay: Let's ante up the bill.
Opposing; against: antiapartheid.
Counteracting; neutralizing: antacid.
Alternative spelling of auntie.
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.