For the misspelling "mercuy", there are a few correct suggestions. The correct spelling is "mercury", a chemical element. By using an "r" instead of a "u", the correct term is achieved.
MarcusMarcus went to the gym this morning before work.
MarcyMarcy is planning on going to law school next year.
MerckMerck & Co. is a global biopharmaceutical company that aims to improve health through the discovery and development of innovative medicines and vaccines.
mercuryMercury is a poisonous chemical element with atomic number 80.
mercy The mercy of the court resulted in a reduced sentence for the defendant.
merry My friends and I had a merry time singing Christmas carols around the fire.