Suggestion: If the search result is a synonym of the search query, display a message at the top saying so.

As a layperson, I searched for "aspirin" and got a result for "Acetylsalicylic acid" and I didn't know if the search result was even correct. If it had said "Acetylsalicylic acid is a synonym of aspirin", things would have made sense immediately.

(I think Wikipedia displays such types of disambiguation info at the top of their pages.)