The word "importancy" usually refers to the quality or state of being important. However, there are several synonyms that can be used interchangeably to convey a similar meaning. One common synonym for importancy is "significance". This term denotes the weight or importance of something. Another synonym is "relevance", which highlights the connection or pertinence of a particular matter. Additionally, the word "value" can be used to talk about the importancy of something, emphasizing its worth or importance in a given context. Other alternatives include "preeminence", "prominence" or "criticality", each conveying the idea of great importance or significance. All in all, these synonyms serve as excellent alternatives when describing the importancy of various subjects or situations.