Here are some examples:
* Extensive research: This indicates research that covers a wide range of topics or sources.
* Extensive damage: This implies that the damage is widespread and affects a large area.
* Extensive knowledge: This suggests a deep understanding of a subject, covering many aspects.
* Extensive renovations: This refers to renovations that cover a significant portion of a building or property.
Note: "Extensive" is often used interchangeably with "comprehensive," "wide-ranging," or "thorough."