Thorianite refers to a rare mineral that consists of thorium oxide. This mineral occurs naturally and is sometimes used in the nuclear industry. However, if you are looking for synonyms for the word "thorianite," there are a few options that you can explore. One synonym for thorianite is thorite, which is another rare mineral containing thorium. Another possibility is thorogummite, a rare thorium-rich mineral that occurs in granite pegmatites. Additionally, you may want to consider fergusonite, another mineral that contains thorium, and is often found in association with other rare earth minerals. Overall, these synonyms highlight the unique nature of thorium-based minerals and their potential applications in various industries.