Explanative is an adjective that describes something that provides an explanation or clarification. Some synonyms for explicative include explanatory, elucidatory, clarifying, illuminating, instructive, informative, and descriptive. The word 'explanatory' can refer to something that is explanatory in nature or it can be the act of explaining something. 'Elucidatory' relates to removing obscurity or doubt, while 'clarifying' refers to making something clear and understandable. 'Illuminating' and 'instructive' are synonyms that shed light on a topic to aid understanding. Descriptive is another word that refers to providing a detailed explanation of something. Each of these synonyms can be used interchangeably with the word "explanatory".