If "sparse" means "thinly scattered or distributed," then its opposite could be:
* Dense: This is the most common and direct opposite.
* Abundant: This implies a large quantity.
* Plentiful: This also suggests a large quantity.
* Thick: This emphasizes the close proximity of items.
* Crowded: This is a more specific opposite when referring to people or objects.
If "sparse" refers to "lacking in detail," then its opposite could be:
* Detailed: This refers to something with a lot of information or specifics.
* Comprehensive: This implies that all relevant details are included.
* Thorough: This suggests that something has been covered in detail.
* Elaborate: This implies something is complex and well-developed.
If "sparse" refers to "lacking in vegetation," then its opposite could be:
* Lush: This describes vegetation that is thick and healthy.
* Dense: This refers to a high density of vegetation.
* Forested: This specifically implies a high density of trees.
Ultimately, the best opposite for "sparse" will depend on the specific context in which it is used.