put behind bars vs remand

put behind bars is not a noun while remand is a noun.

Word	Noun	Adjective	Verb	Adverb
put behind bars	No	No	Yes	No
remand	Yes	No	Yes	No

As verbs, put behind bars and remand are synonyms defined as:

Other synonyms of put behind bars include gaol, immure, imprison, incarcerate, jail, jug, lag, put away.

put behind bars (noun)	remand (noun)
	the act of sending an accused person back into custody to await trial (or the continuation of the trial)

put behind bars (verb)	remand (verb)
lock up or confine, in or as in a jail	refer (a matter or legal case) to another committee or authority or court for decision
	lock up or confine, in or as in a jail