The words medals, meddles sound the same but have different meanings and spellings. Why do medals, meddles sound the same even though they are completely different words?
The answer is simple: medals, meddles are homophones of the English language.
Plural form of medal.
Third-person singular simple present indicative form of medal.
Third-person singular simple present indicative form of meddle.
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.