put away vs put behind bars

put away and put behind bars both are verbs.

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

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

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

put away (verb)	put behind bars (verb)
turn away from and put aside, perhaps temporarily	lock up or confine, in or as in a jail
eat up; usually refers to a considerable quantity of food
kill gently, as with an injection
place in a place where something cannot be removed or someone cannot escape
stop using
throw or cast away
lock up or confine, in or as in a jail