| bookmark | bookmark |
| Bookmark | bookmark |
| Bookmarklet | bookmarklet |
| Bookmaker | bookmaker |
| Boomer | boomer |
| Ostmark | ostmark |
| Nordmark | North March Northern March |
| Bookie | bookmaker |
| Boolean | Boolean |
| Booster | booster |
| Bootcamp | boot camp |
| Boom | boom |
| Bootsmann | boatswain bosun boatman boatsman |
| Böotier | Boeotian |
| boomen | boom |
| Bokmål | Bokmål |
| Fockmast | fore-mast foremast |
| Finnmark | markka |
| Bahamaer | Bahamian |
| Baumarkt | DIY shop hardware store (US) ironmonger's |