Multitiered, a word used to describe something with multiple levels or layers, can be substituted with a variety of other synonyms. Some options include "layered," "multi-layered," "multi-level," "complex," "hierarchical," or "multi-faceted." Each of these words allows for a description of something that has several parts, whether it be physical or abstract. Another possible synonym is "nested," which is used to describe layers that are contained within one another. These synonyms can be used to add depth and complexity to a description, helping to convey a sense of structure and organization.