"Has a tree" can be replaced by various synonyms depending on the context. For instance, if you're describing someone's garden, you can use "boasts a tree" or "features a tree". If you're discussing the environment, you can say "is surrounded by trees" or "is replete with trees". If you want to emphasize the importance of the tree, you can say "proudly displays a tree" or "champions a tree". Alternatively, if you're referring to a public park, you can use "houses a tree" or "is home to a tree". Overall, using synonyms for "has a tree" can add variety and interest to your writing.