sonic boom / bong (marijuana pipe)

banjo

banner (in political demonstration) / banderole (in the sense of "streamer, little banner, little flag") / streamer (as a decoration) / banderole (flat band with an inscription)

bandage

bandit
/ bandit

second-person singular past historic of bananer

headband, bandeau / bandage / blindfold / a tight headband worn for a long time, usually from youth, for the ancient folk custom of cranial deformation

banyan (tropical Indian fig tree) / banian (Indian trader)

one-armed bandit

(historical) highwayman, highway robber