WEnergy
WBuchdahl's theorem
WDark energy
WEnthalpy
WGeneric object of dark energy
WGravitational potential
WInternal energy
WInvariant mass
WJosephson effect
WMass–energy equivalence
WMechanical energy
WQED vacuum
WQuantum fluctuation
WThermodynamic free energy
WTime translation symmetry
WVersatile Test Reactor
WWork (physics)
WZero-point energy