study hall vs school

study hall and school both are nouns.

Word	Noun	Adjective	Verb	Adverb
study hall	Yes	No	No	No
school	Yes	No	Yes	No

study hall (noun)	school (noun)
a classroom reserved for study	a building where young people receive education
a period of time during the school day that is set aside for study	the process of being formally educated at a school
	an educational institution
	a large group of fish
	a body of creative artists or writers or thinkers linked by a similar style or by similar teachers
	an educational institution's faculty and students
	the period of instruction in a school; the time period when school is in session

study hall (verb)	school (verb)
	swim in or form a large group of fish
	educate in or as if in a school
	teach or refine to be discriminative in taste or judgment