curser, cursor

The words curser, cursor sound the same but have different meanings and spellings. Why do curser, cursor sound the same even though they are completely different words?

The answer is simple: curser, cursor are homophones of the English language.

  1. :: noun

    One who curses.

  1. :: noun

    Computer Science A bright, usually blinking, movable indicator on a display, marking the position at which a character can be entered, corrected, or deleted.

Definitions from Wiktionary, Creative Commons Attribution/Share-Alike License, from The American Heritage® Dictionary of the English Language, 4th Edition and Wordnik.

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About Homophones

Homophones (literally "same sound") are usually defined as words that share the same pronunciation, regardless of how they are spelled.

If they are spelled the same then they are also homographs (and homonyms); if they are spelled differently then they are also heterographs (literally "different writing").