Short subject and Toon

Short subject noun - A brief film; often shown prior to showing the feature.

Toon and short subject are semantically related. In some cases you can replace term "Toon" with "Short subject", this terms are similar.

Toon noun - A film made by photographing a series of cartoon drawings to give the illusion of movement when projected in rapid sequence.

Short subject and toon are semantically related. You can use "Short subject" instead a noun "Toon".