In substantialities refer to things that are significant, important, or essential. There are various synonyms for this term, such as materiality, substance, weight, and significance. These words can be used to describe objects, ideas, or concepts that hold great value or relevance. Other synonyms for in substantialities include relevance, usefulness, magnitude, and gravity, all of which connote the importance of an object or idea. It is important to use these words correctly in order to effectively convey the level of importance and relevance that a particular object, idea, or concept carries.