When discussing the topic of "more solid gold," it is essential to consider its antonyms. The first antonym of the phrase may be "less solid gold," which means that the gold is not as compact or sturdy as it should be. Secondly, "hollow gold" is another antonym that shows the idea of the gold not having any substance or core. Instead, it has cavities, and therefore, it's not genuine. "Fake gold" is also an antonym that means something that appears to be made of gold but is not. Lastly, "unreliable gold" is also an antonym that means the gold is not dependable, and it cannot be trusted. In summary, the antonyms of "more solid gold" encompass the overall quality, transparency, authenticity, and trustworthiness of gold.