| BitSpirit | BitSpirit |
| bitter | bitter |
| Bitter Mælkeurt | Dwarf Milkwort |
| Bittersød Natskygge | Solanum dulcamara |
| BitTornado | BitTornado |
| BitTorrent | BitTorrent |
| BitTorrent tracker | BitTorrent tracker |
| bitumen | bitumen |
| bivirkning | side effect |
| bivoks | beeswax |
| bivuak | bivouac |
| bizar | bizarre |
| biæder | bee-eater |
| Bjarkøy | Bjarkøy |
| Bjarne Stroustrup | Bjarne Stroustrup |
| bjerg | mountain |
| Bjerg-vejrandøje | Gorgon |
| bjergand | greater scaup |
| bjergart | rock |
| Bjergbestigere | List of climbers |
| Bjergbestigning | Ascension |
| bjergirisk | twite |
| Bjergkam | Arete |
| bjergklima | mountain climate |
| bjergkrystal | rock crystal |
| bjergkæde | mountain range |
| Bjergkøbing Grandprix | Flåklypa Grand Prix |
| Bjerglærke | Shore Lark |
| bjergområde | mountainous area |
| Bjergpas | Mountain pass |
| Bjergprædikenen | Sermon on the Mount |
| bjergskov | mountain forest |
| Bjergsted Kommune | Bjergsted |
| Bjergte | Gaultheria |
| Bjergtrøje | King of the Mountains |
| Bjerke | Bjerke |
| Bjerkreim | Bjerkreim |
| Bjerre Herred | Bjäre Hundred |
| Bjerringbro Kommune | Bjerringbro municipality |
| Bjugn | Bjugn |
| Bjuvs kommun | Bjuv Municipality |
| Björk | Björk |
| Björn Borg | Björn Borg |
| Björn Leukemans | Björn Leukemans |
| Björn Schröder | Björn Schröder |
| Björn Ulvaeus | Björn Ulvaeus |
| bjørn | bear |
| Bjørn Lomborg | Bjørn Lomborg |
| Bjørn Wiinblad | Bjørn Wiinblad |
| bjørne | ursid |
| Bjørne-banden | Beagle Boys |
| Bjørnedyr | Tardigrade |
| Bjørnerod | Meum athamanticum |
| bjørneunge | bear cub |
| Bjørnevogteren | Boötes |
| Bjørneøen | Bjørnøya |
| Bjørnstjerne Martinus Bjørnson | Bjørnstjerne Bjørnson |
| Blaabjerg Kommune | Blaabjerg |
| Blaafarveværket | Blaafarveværket |
| Black Celebration | Black Celebration |
| Black Mesa Research Facility | Black Mesa Research Facility |
| Black Mountain | Black Mountain |
| Black Sabbath | Black Sabbath |
| Black Sabbaths diskografi | Black Sabbath discography |
| Blackbeard | Blackbeard |
| Blacksad | Blacksad |
| Blackwater USA | Blackwater Worldwide |
| blad | leaf |
| Blade | Leaf |
| Blade Runner | Blade Runner |
| bladgrønt | chlorophyll |
| Bladhovedtidsel | Cirsium |
| Bladrullesyge | Potato leaf roll virus |
| Bladselleri | Celery |
| Bladskærermyre | Leafcutter ant |
| Blag | Blog |
| Blagovesjtjensk | Blagoveshchensk |
| Blaise Pascal | Blaise Pascal |
| blandbarhed | miscibility |
| blanding | mixing |
| blandingsprodukt | miscellaneous product |
| blandskov | mixed forest |
| blandt | among |
| Blandt andet | Amond other things |
| Blanka af Kastilien | Blanche of Castile |
| blasfemi | blasphemy |
| blasfemisk | blasphemous |
| ble | nappy |
| Bled | Armpit of the universe |
| Bleda | Bleda |
| blegejord | bleaching clay |
| blegemiddel | bleach |
| blegeproces | bleaching process |
| blehers rødnæse | firehead tetra |
| Blekinge | Blekinge |
| Blekinge län | Blekinge County |
| Blemmya | Blemmyes |
| Blended whisky | Blended whiskey |
| Blender | Blender |
| Blenheim | Blenheim |
| blidemåned | February |
| blidt | softly |
| blind | blind |
| blind vej | cul-de-sac |
| blindgade | cul-de-sac |
| blindgyde | blind alley |
| Blindhed | Blindness |
| Blindtarmsbetændelse | Appendicitis |
| blinke | wink |
| Blinkende Lygter | Flickering Lights |
| Blinkmikroskop | Blink comparator |
| blisgås | white-fronted goose |
| Blishøne | Eurasian Coot |
| Blitzkrieg | Blitzkrieg |
| Blitzkriegdoktrinen | Blitzkrieg |
| blive | turn |
| Bloc Party | Bloc Party |
| blod | blood |
| blod er tykkere end vand | blood is thicker than water |
| Blod i vandet-kampen | Blood in the Water match |
| Blod-Ribs | Ribes sanguineum |
| blodappelsin | blood orange |
| blodbad | bloodbath |
| bloddonor | blood donor |
| blodhund | bloodhound |
| blodig | bloody |
| blodigle | leech |
| Blodkar | Blood vessel |
| Blodkredsløbet | Circulatory system |
| Blodmangel | Anemia |
| Blodplade | Platelet |
| blodplasma | blood plasma |
| Blodprop i hjertet | Myocardial infarction |
| blodprøve | blood |
| Blodtryk | Blood pressure |
| Blodtype | Blood type |
| blodtørst | bloodlust |
| blodurt | bloodroot |
| Blodåre | Blood vessel |
| Blodørn | Blood eagle |
| Bloemfontein | Bloemfontein |
| blog | blog |
| Blois | Blois |
| blokade | blockade |
| Blokaden af Berlin | Berlin Blockade |
| blokfløjte | recorder |
| Bloksbjerg | The Brocken |
| blomkål | cauliflower |
| blomme | plum |
| Blommetaks | Cephalotaxus |
| Blommetaks-familien | Cephalotaxaceae |
| blommetræ | plum |
| blomst | blossom |
| Blomster og træer | Flowers and Trees |
| blomsterbed | flowerbed |
| Blomsterbørns børn | Family Ties |
| Blomstereng | Organic lawn management |
| Blomsterpikkere | Flowerpecker |
| blomsterplanter | angiosperm |
| Blomstersiv-familien | Scheuchzeria |
| blomstre | flower |
| Blondi | Blondi |
| Bloodhound Gang | Bloodhound Gang |
| Bloody Mary | Bloody Mary |
| Bloomberg | Bloomberg |
| Blot | Blót |
| blotter | flasher |
| blottet | naked |
| Blu-ray | Blu-ray Disc |
| Blue | Blue |
| Blue Angels | Blue Angels |
| Blue Mountains | Blue Mountains |
| Blue Ocean Strategy | Blue Ocean Strategy |
| Blue Ridge Mountains | Blue Ridge Mountains |
| Bluegrass | Bluegrass music |
| Blues | Blues |
| Blues Brothers | The Blues Brothers |
| Blues-skala | Hexatonic scale |
| Bluescreen | Bluescreen |
| Bluetooth | Bluetooth |
| bluse | shirt |
| bly | lead |
| blyant | pencil |
| Blyant-Ene | Juniperus virginiana |
| blyforbindelse | lead compound |
| blyfri | unleaded |
| blyglans | galena |
| blyindhold i blodet | lead level in blood |
| Blyrod-familien | Plumbaginaceae |
| blå | blue |
| blå anemone | common hepatica |
| blå bog | yearbook |
| Blå bånd | Blue Riband |
| Blå dykkerantilope | Blue Duiker |
| Blå Lagune | Blue Lagoon |
| Blå Nil | Blue Nile |
| blå skærm | blue screen of death |
| blå skærm af død | blue screen of death |
| Blå toner | Blue note |
| Blå-Gran | Picea pungens |
| Blåbælg-familien | Lardizabalaceae |
| Blåbælg-slægten | Decaisnea |
| Blåfasan | Aokiji |
| Blåfjella-Skjækerfjella nationalpark | Blåfjella-Skjækerfjella |
| Blåfugle | Lycaenidae |
| Blågrøn Rose | Rosa dumalis |
