dorm vs residence hall

dorm and residence hall both are nouns.

Word	Noun	Adjective	Verb	Adverb
dorm	Yes	No	No	No
residence hall	Yes	No	No	No

As nouns, dorm and residence hall are synonyms defined as:

dorm and residence hall: a college or university building containing living quarters for students

Other synonyms of dorm include dormitory, hall, student residence.

dorm (noun)	residence hall (noun)
a college or university building containing living quarters for students	a college or university building containing living quarters for students