Electron Gain Enthalpy Vs Electronegativity

Electron Gain Enthalpy	Electronegativity
It is the tendency of an isolated gaseous atom to attract an electron.	It is the tendency of an atom in a molecule to attract the shared pair of electrons.
It is the property of isolated atoms.	It is the property of a bonded atom.
It is the absolute electron attracting power of an atom.	It is the relative attracting power of an atom.
It can be experimentally measured.	It cannot be measured experimentally. It is only a relative number.
It has units such as kJ mol-1 or eV/atom.	It has no units. There are only scales for comparison.
The electron gain enthalpy of an atom is constant.	The electronegativity of an atom is not constant. It depends upon the oxidation state of an atom, hybridization state of the atom and the nature of substituents attached to it.