Well, no. A bill of impeachment is a bill of impeachment. An indictment is a JUDICIAL/criminal justice instrument, a bill of impeachment is a legislative instrument.
picky picky...my point is it can be thought of as kind of an indictment. If an indictment is thought of as a statement “Hey there is enough evidence to bring this person or persons to trial (judicial, legislative or farcical versions!)!” then a bill of impeachment is similar since there is a Senate trial.