The words bocks, box sound the same but have different meanings and spellings. Why do bocks, box sound the same even though they are completely different words?
The answer is simple: bocks, box are homophones of the English language.
Plural form of bock.
A cable box.
A container typically constructed with four sides perpendicular to the base and often having a lid or cover.
The amount or quantity that such a container can hold.
A square or rectangle: Draw a box around your answer.
Definitions from Wiktionary, Creative Commons Attribution/Share-Alike License, 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.