1. happening, existing, or arising at precisely the same time
Usage: formal; less common than ‘synchronous’

Examples

• The synchronical movements of the dancers created a mesmerizing performance.
• Scientists observed synchronical changes in both populations.
• The synchronical timing of the events was purely coincidental.
• Historical records show synchronical developments in distant civilizations.
• The synchronical nature of their discoveries surprised the research community.
• Synchronical patterns emerged in the data from different regions.