A dead shot can refer to someone who is an expert marksman or sharpshooter. However, there are various synonyms for this word that can be used depending on the context. These include skilled shooter, accurate gunner, crack shot, ace marksman, proficient marksman, expert sniper, and seasoned shooter. In addition, the word can also signify an unstoppable force, in which case synonyms include a surefire success, certain winner, unbeatable contender, unquestionable victor, or unstoppable winner. Overall, the word dead shot has multiple meanings, and the synonyms one might use will depend on the specific context in which the word is used.