The words review, revue sound the same but have different meanings and spellings. Why do review, revue sound the same even though they are completely different words?
The answer is simple: review, revue are homophones of the English language.
To look over, study, or examine again.
To consider retrospectively; look back on.
To examine with an eye to criticism or correction: reviewed the research findings.
To write or give a critical report on (a new work or performance, for example).
A musical show consisting of skits, songs, and dances, often satirizing current events, trends, and personalities.
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.
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").