toon vs short subject

toon and short subject both are nouns.

Word	Noun	Adjective	Verb	Adverb
toon	Yes	No	No	No
short subject	Yes	No	No	No

As nouns, short subject is a hypernym of toon; that is, short subject is a word with a broader meaning than toon:

toon: a film made by photographing a series of cartoon drawings to give the illusion of movement when projected in rapid sequence
short subject: a brief film; often shown prior to showing the feature

toon (noun)	short subject (noun)
a film made by photographing a series of cartoon drawings to give the illusion of movement when projected in rapid sequence	a brief film; often shown prior to showing the feature