detention centre vs jail cell

detention centre and jail cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
detention centre	Yes	No	No	No
jail cell	Yes	No	No	No

As nouns, jail cell is a hypernym of detention centre; that is, jail cell is a word with a broader meaning than detention centre:

detention centre: a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily
jail cell: a room where a prisoner is kept

Other hypernyms of detention centre include cell, prison cell.

detention centre (noun)	jail cell (noun)
a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily	a room where a prisoner is kept