bill of indictment vs complaint

bill of indictment and complaint both are nouns.

Word	Noun	Adjective	Verb	Adverb
bill of indictment	Yes	No	No	No
complaint	Yes	No	No	No

bill of indictment (noun)	complaint (noun)
a formal document written for a prosecuting attorney charging a person with some offense	an expression of grievance or resentment
	(formerly) a loud cry (or repeated cries) of pain or rage or sorrow
	(civil law) the first pleading of the plaintiff setting out the facts on which the claim for relief is based
	(criminal law) a pleading describing some wrong or offense
	an often persistent bodily disorder or disease; a cause for complaining