The word "lustrative" can be defined as serving to make something clear or understandable, especially through the use of illustrations or examples. Some synonyms for this word include illustrative, exemplifying, clarifying, explicative, interpretive, or demonstrative. These words all imply a similar meaning of providing clarity and understanding to something complex. Whether it be through visual aids, or verbal explanations, these words all convey the notion of shedding light on a topic or idea. If you're looking to use a different word than "lustrative," consider using one of these synonyms to keep your writing both concise and impactful.