ABSENTEE, ABSENTEEISM and ABSENTEE LANDLORD

ABSENTEE 

A person who is absent from a place, event where he is expected.

Memory key 

Absent we know, then remember absentee as last letter 'e' for expected.

ABSENTEEISM 

A frequent absent from school or work particularly without reason.

ABSENTEE LANDLORD 

A person who does not live at and rarely visits the property.

Example 

As his owner was absentee landlord he treated the place as he like.