- themeA subject, now especially of a talk or an artistic piece; a topic.
- calthemiteAny secondary calcareous deposit, created by the action of water outside the natural cave environment. They are typically found on man made structures and mimic the shapes and forms of cave speleothems, such as stalactites, stalagmites, flowstone etc.
- thematiseTo convert (a sentence or a part of it) into a theme.