As nouns the difference between occupant and occupier
is that occupant is a person who occupies a place or a position while occupier is one who occupies, particularly with respect to a foreign government controlling the territory of another.
occupant
English
Noun
(
en noun)
A person who occupies a place or a position.
An owner or tenant of a property.
A person sitting in a car or other vehicle.
occupier
English
Noun
(
en noun)
One who occupies, particularly with respect to a foreign government controlling the territory of another.