The term 'apartment relative' can be solved by the five-letter word 'CONDO'. A condominium, or CONDO, is a type of housing that is similar to an apartment but is owned by the individual occupant. Condos are typically part of a larger building or complex and are usually managed by a homeowners association. They offer many of the same amenities as apartments, such as shared facilities and common areas, but with the added benefit of ownership.