Fool's gold, also known as iron pyrite, is a mineral that is often mistaken for actual gold due to its shiny and golden appearance. Despite its superficial resemblance to real gold, it is worth far less and has no actual value. Some synonyms for the term "fool's gold" include the words dross, counterfeit, fake, imitation, mock, and bogus. These words all carry a sense of deception, illusion, and falsehood that relate to the idea that fool's gold is a fake substitute for the real thing. Using these terms can help to emphasize the difference between true value and mere appearance.