| Acronym | Definition |
|---|
| ARCHES | Assessment and Rehabilitation of Central European Highway Structures (EU Specific Targeted Research Project) |
| ARCHES | Abrupt Climate Change Studies |
| ARCHES | Aquinas Roman Catholic Home Education Services (est. 1995; Wyoming, MN) |
| ARCHES | Association de Réflexion, de Communication Hospitalières et Éducatives pour la Santé |
| ARCHES | Appui aux Recherches sur la Contextualisation et l'Harmonisation des Enseignements Secondaires (French: Support for Research on Contextualization and Harmonization of Secondary Education) |
| ARCHES | Advocates to Revitalize Cultural and Historic Elgin Sites (Elgin, IL) |