Sub-divisions refer to smaller parts or sections of a larger group or organization. Antonyms for sub-divisions include consolidation, unification, and amalgamation. Consolidation refers to the act of bringing together different parts or elements to form a single unit. Unification, on the other hand, refers to the process of combining separate entities or systems into one. Amalgamation refers to the combination or blending of different things to create a unified whole. These antonyms highlight the opposite concepts to sub-divisions, which are focused on breaking down larger groups into smaller parts.