Extensive quantity
Its magnitude is additive for subsystems, e.g. volume, entropy, number of moles, displacement, induction, strain.
Intensive quantity
Its magnitude is independent of the size of the system, e.g. temperature, pressure, chemical potential, electric field, magnetic field, stress
Conjugate quantities

A pair of variables that their product has the dimension of energy or energy per unit volume, e.g. temperature and entropy, pressure and volume.

See the wikipedia.