[The FreeOnline Dictionary][1] does give the following definition of exhibit

>exhibit

>n.
>1. The act or an instance of exhibiting.

>2. Something exhibited: studied the dinosaur exhibits at the museum.

>3. A public showing; an exhibition: spent the afternoon at the space exhibit.

>4. Law Something, such as a document, formally introduced as evidence in court.

Judging from the third definition, exhibit and [exhibition][2] are synonyms (apart from some quite specific meanings)


  [1]: http://www.thefreedictionary.com/exhibit
  [2]: http://www.thefreedictionary.com/exhibition