IPA: /ˈsɪŋkrənɪzəm/
KK: /sɪŋˈkrɪnɪzəm/
The occurrence of events at the same time or the arrangement of events in a way that shows they happen together.
The synchronism of the two historical events helped historians understand their relationship.
Synchronism → It is formed from "syn-" (meaning together) and "chronos" (meaning time). The word refers to events occurring at the same time or in a coordinated manner.
Think of events happening 'together' ('syn-') in 'time' ('chronos') — that's what synchronism means.