| blue chips | blue chips |
| Blue Gene | Blue Gene |
| Blue Heelers - Poliziotti con il cuore | Blue Heelers |
| blue jeans | bluejeans |
| Blue Licks State Park | Blue Licks State Park |
| Blue Marble | The Blue Marble |
| Blue Mountains | Blue Mountains |
| Blue Noah - Mare spaziale | Space Carrier Blue Noah |
| Blue note | Blue note |
| Blue Rose | Blue rose |
| Blue Sky Studios | Blue Sky Studios |
| Blue Steel | Blue Steel missile |
| Blue Streak | Blue Streak missile |
| Blue Train | Blue Train |
| Blue Öyster Cult | Blue Öyster Cult |
| Bluebeat | Blue Beat Records |
| Bluegrass | Bluegrass music |
| Blues | Blues |
| Blues for the Red Sun | Blues for the Red Sun |
| Blues punk | Punk blues |
| Blues rock | Blues-rock |
| Bluetongue | Bluetongue disease |
| Bluetooth | Bluetooth |
| Bluff - Storia di truffe e di imbroglioni | Destry Rides Again |
| Bluff Dale | Bluff Dale |
| bluffare | feign |
| bluffatore | bluffer |
| bluffatrice | bluffer |
| Blum Blum Shub | Blum Blum Shub |
| Blumau-Neurißhof | Blumau-Neurißhof |
| Blumberg | Blumberg |
| Blumegg | Blumegg |
| Blumenstein | Blumenstein |
| blusa | smock |
| Blusotto | Overalls |
| Blut und Boden | Blood and soil |
| Bluto | Bluto |
| Blyde River Canyon | Blyde River Canyon |
| Blâmont | Blâmont |
| Blåvandshuk | Blåvandshuk |
| Blériot XI | Blériot XI |
| Blót | Blót |
| BM | BM |
| BMG | BMG |
| BMG Ricordi | BMG |
| BMS | Storm warning |
| BMW | BMW |
| BMW Neue Klasse | BMW New Class |
| BMW Sauber | BMW Sauber |
| BMX | BMX |
| BNC | BNC connector |
| bo | humph |
| Bo Diddley | Bo Diddley |
| boa | boa |
| Boabdil di Granada | Muhammad XII of Granada |
| boara | cowherd |
| Board of European Students of Technology | Board of European Students of Technology |
| Board Support Package | Board support package |
| Boarnsterhim | Boarnsterhim |
| boaro | cowherd |
| Boat people | Boat people |
| boato sonico | sonic boom |
| bob | bobsleigh |
