The words torc, torque sound the same but have different meanings and spellings. Why do torc, torque sound the same even though they are completely different words?
The answer is simple: torc, torque are homophones of the English language.
Alternative spelling of torque. ("necklace")
The moment of a force; the measure of a force's tendency to produce torsion and rotation about an axis, equal to the vector product of the radius vector from the axis of rotation to the point of application of the force and the force vector.
A turning or twisting force.
To impart torque to.
A collar, a necklace, or an armband made of a strip of twisted metal, worn by the ancient Gauls, Germans, and Britons.
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.
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").