What word can go before holidayrelations school?

The word that can go before "holiday relations school" depends on the context you're aiming for. Here are a few possibilities:

For a specific type of school:

* Summer: Summer holiday relations school

* Winter: Winter holiday relations school

* International: International holiday relations school

* Hospitality: Hospitality holiday relations school

* Tourism: Tourism holiday relations school

For a general description:

* The: The holiday relations school

* A: A holiday relations school

* This: This holiday relations school

For a specific purpose:

* Diploma: Diploma holiday relations school

* Certificate: Certificate holiday relations school

* Training: Training holiday relations school

Without more context, it's difficult to give a definitive answer. Could you please provide more information about what you're trying to convey?