preunion

As a noun terms

is .

As an adjective preunion is

prior to the existence of a union.

As a proper noun Réunion

is island in the Indian Ocean to the west of Mauritius and to the east of Madagascar.

As a noun reunion

is the process or act of reuniting.

As an adjective preunion is

prior to the existence of a union.

As a noun union

is union (action and result).

As an adjective preunion is

prior to the existence of a union.