The phrase "sets on" can be used in a variety of ways, but it essentially means to place or position something onto something else. Some synonyms for this term include "lays on," "puts on," "arranges on," "mounts on," "plants on," "fastens on," "fixes on," "affixes on," "secures on," and "attaches on." Depending on the context, there may be other appropriate synonyms as well. For example, in the context of the sun setting on the horizon, synonyms could also include "descends on" or "drops on." Having a broad understanding of synonyms for common phrases like "sets on" can help improve communication and writing skills.