The words en, n sound the same but have different meanings and spellings. Why do en, n sound the same even though they are completely different words?
The answer is simple: en, n are homophones of the English language.
The letter n.
Printing A space equal to half the width of an em.
The 14th letter of the modern English alphabet.
Any of the speech sounds represented by the letter n.
The 14th in a series.
Something shaped like the letter N.
Definitions 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.