The words gyve, jive sound the same but have different meanings and spellings. Why do gyve, jive sound the same even though they are completely different words?
The answer is simple: gyve, jive are homophones of the English language.
A shackle or fetter, especially for the leg.
To shackle or fetter.
Jazz or swing music.
The jargon of jazz musicians and enthusiasts.
Slang Deceptive, nonsensical, or glib talk: "the sexist, locker-room jive of men boasting and bonding” ( Trip Gabriel).
To play or dance to jive music.
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").