emerges, immerges

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

The answer is simple: emerges, immerges are homophones of the English language.

emerges
  1. :: verb

    Third-person singular simple present indicative form of emerge.

immerges
  1. :: verb-intransitive

    To submerge or disappear in or as if in a liquid.

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").