moot court vs tribunal

moot court and tribunal both are nouns.

Word	Noun	Adjective	Verb	Adverb
moot court	Yes	No	No	No
tribunal	Yes	No	No	No

As nouns, tribunal is a hypernym of moot court; that is, tribunal is a word with a broader meaning than moot court:

moot court: a mock court where law students argue hypothetical cases
tribunal: an assembly (including one or more judges) to conduct judicial business

Other hypernyms of moot court include court, judicature.

moot court (noun)	tribunal (noun)
a mock court where law students argue hypothetical cases	an assembly (including one or more judges) to conduct judicial business