- bypass engine
- bypass ratio
- bypast
- bypath
- by-path
- by-play
- by-plot
- by-product
- Byrd
- Byrd, Richard E.
- Byrd Land
- Byrds
- byre
- by reason of
- byre-man
- by request
- Byrgius
- by rights
- Byrne
- Byrnes
- byrnie
- byroad
- by-road
- Byron
- Byron, George Gordon, Lord
- Byronic
- Byronically
- Byronic hero
- Byronism
- byrrus
- byssinosis
- byssus
- bystander
- by storm
- bystreet
- by-street
- by surprise
- by-talk
- byte
- by the balls
- by the board
- by the book
- by the bye
- by the day
- by the dozen
- by the numbers
- by the same token
- by the seat of the pants
- by the short hairs
- by the skin of one's teeth
- by the sweat of one's brow
- by the way
- Bytom
- bytownite
- by turns
- by virtue of
- byway
- by way of
- by weight
- byword
- by word of mouth
- by-work
- by-your-leave
- Byz.
- Byzantine
- Byzantine chant
- Byzantine Church
- Byzantine Empire
- Byzantinism
- Byzantinist
- Byzantium
- Byzas
- bz
- Bz
- Bz.
