E4
- 4E (disambiguation)
- Aero Asia International
- Big Four (Western Europe)
- Boeing E-4
- CNW Class E-4
- Central Expressway (Sri Lanka)
- Corporal
- E postcode area
- E-4 process
- E4 (TV channel)
- E4 European long distance path
- E4 Series Shinkansen
- E4 expressway (Pakistan)
- E4 grade
- E4-isoprostane
- EIV (disambiguation)
- EMC E4
- Entertainment for All
- Estetrol
- European route E4
- Every Extend Extra Extreme
- F4 (mathematics)
- Fokker E.IV
- GER Class T26
- Honda E4
- King's Pawn Game
- Leukotriene E4
- Middle C
- Petty officer third class
- RCS-4
- Senior airman
- Sergeant
- South Kedah Expressway
- Specialist (rank)
- Subic Freeport Expressway
- Tōhoku Expressway