by-by-, bye- /baɪ/ prefix 
less important: 
a by-product (=something made in addition to the main product) a by-election (=one held between regular elections)
less important: a by-product (=something made in addition to the main product) a by-election (=one held between regular elections)- double
- double act
- double agent
- double-barrelled
- double bass
- double bed
- double bill
- double bind
- double-blind
- double bluff
- double boiler
- double-book
- double-booking
- double-breasted
- double-check
- double chin
- double click
- double cream
- double cross
- double-cross
- double-crosser
- double date
- double-date
- double dealer
- double dealing