boffin /bofˈin/ (orig milit sl)

1. A research scientist, esp one employed by the armed forces or government
2. Any expert or intellectual

• spare-time
• spare times
• spare tyre
• spare tyres
• sparganium
• sparganiums
• sparge
• sparged
• sparger
• spargers
• sparges
• sparging
• spar-hawk
• spar-hawks
• sparid
• sparids
• sparing
• sparingly
• sparingness
• sparingnesses
• spark
• spark chamber
• spark chambers
• spark coil
• spark coils