The word "expositive" refers to something that is explanatory or illuminative in nature. Some synonyms for this term include "informative," "explanatory," "educational," and "instructive." Other related words that convey a similar meaning include "illuminating," "enlightening," "clarifying," "elucidating," and "explicatory." All of these synonyms highlight the importance of providing clear and concise explanations in order to enhance understanding and knowledge. Whether you are writing an academic essay, delivering a presentation, or simply trying to convey information to others, these words can be useful in emphasizing the informative and educational nature of your work.