Threedollar bill is a term used to express something that is fake or not genuine. Antonyms for threedollar bill could be real, authentic, genuine, legitimate, or bona fide. These words signify the opposite of threedollar bill, which implies that something is fraudulent, counterfeit, or unrealistic. Being aware of antonyms for threedollar bill can help in identifying the genuine nature of things, situations, or people. Therefore, when something is described as authentic or legitimate, it means that it is trustworthy and actual, and not just a shallow imitation. In conclusion, antonyms for threedollar bill are a key tool in identifying what is real and true.