The phrase "are off the mark" implies that something is incorrect or inaccurate. Some antonyms for this phrase could include "are on point," "are accurate," "are correct," "are right," or "are precise." These antonyms suggest that something is spot on and aligns perfectly with the truth or intended target. It's essential to use accurate language and precise words when communicating to avoid misunderstandings or confusion. By using antonyms for "are off the mark," we can communicate more effectively and ensure that our intended message is delivered clearly and accurately.