imprison vs jug

imprison is not a noun while jug is a noun.

Word	Noun	Adjective	Verb	Adverb
imprison	No	No	Yes	No
jug	Yes	No	Yes	No

As verbs, imprison and jug are synonyms defined as:

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

imprison (noun)	jug (noun)
	a large bottle with a narrow mouth
	the quantity contained in a jug

imprison (verb)	jug (verb)
lock up or confine, in or as in a jail	stew in an earthenware jug
confine as if in a prison	lock up or confine, in or as in a jail