junkie or junky/ʹjungki/ noun (pl -ies) (pl junkies)

• brainpan
• brainpower
• brain stem
• brainstorm
• brainstorming
• brains trust
• brainteaser
• brain trust
• braintwister
• brainwash
• brain wave
• brainy
• braise
• brak
• brake
• brake disc
• brake drum
• brake-fade
• brake fluid
• brake horsepower
• brake light
• brake lining
• brakeman
• brake pad
• brake shoe