bystander [bystanders](a person who, although present at some event, does not take part in it; an observer or spectator) noun [UK: ˈbaɪ.stæn.də(r)] [US: ˈbaɪ.ˌstæn.dər]
defendant [defendants](party responding to the complaint) noun [UK: dɪ.ˈfen.dənt] [US: də.ˈfen.dənt]