- Synarchism
- synarthrosis
- synarthry
- sync
- syncarp
- syncaryon
- syncategorematic word
- syncheimadia
- synchondrosis
- synchoropaedia
- synchro
- synchro-Compton radiation
- synchro control
- synchro-cyclotron
- synchrocyclotron
- synchro-cyclotron radiation
- synchrocyclotron radiation
- synchro error
- synchromesh
- synchronal rotary compressor
- synchrone
- synchroneity
- synchronic communication
- synchronic dictionary
- synchronic distance