Sluices are channels or gates that are used to regulate the flow of water. Synonyms for sluices include gates, locks, barriers, channels, and conduits. These terms all refer to structures that are designed to control the flow of water and prevent floods or droughts. Other synonyms for sluices include spillways, dams, floodgates, and watergates. These structures are often found in rivers, canals, and other bodies of water, and are essential in managing water resources for irrigation, transportation, and power generation. Whether it's a simple gate or a complex dam, sluices play an important role in shaping our water systems.