Epithecal refers to something situated or occurring on or within the epidermis or outer layer of cells. When seeking synonymous terms for this word, various replacements can be considered. Firstly, the term "cutaneous" can be used as a synonym for epithecal, emphasizing something that pertains to or affects the skin. Additionally, the term "dermal" can be employed, highlighting anything related to or originating from the skin. Furthermore, the word "epidermal" can also be used interchangeably with epithecal, emphasizing the outermost layer of cells. All these synonyms effectively convey the same meaning, highlighting the location or occurrence on or within the outer layer or cells, such as the epidermis.