The words raki, rocky sound the same but have different meanings and spellings. Why do raki, rocky sound the same even though they are completely different words?
The answer is simple: raki, rocky are homophones of the English language.
A brandy of Turkey and the Balkans, distilled from grapes or plums and flavored with anise.
Consisting of, containing, or abounding in rock or rocks.
Resembling or suggesting rock; firm or hard.
Steadfast or stubborn; unyielding: her rocky heart.
Marked by obstructions or difficulties: the rocky road to success.
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.