Suit/case

Has anyone noticed that one can bring a "suit" against someone else and one's "case" can come up in court. You can also hire a lawyer (who will be wearing a suit) to write a brief. Lawyers don't keep their underwear in their briefcases, by the way. But when they travel they put their suits in their suitcases. They wear suits and carry briefcases, they keep their briefs (of their cases and suits) in those cases.

I don't know. Maybe it's important.