synchronous modulation - ternary
- synchronous modulation
- synchronous rectification
- synchronous satellite
- synchrophasotron
- synchroprinter
- synchroscope
- synchrotimer
- synchrotransmitter
- synchrotron
- synclinal basin
- syncline
- syncline slope
- syngenesis
- synoptic chart
- synoptic meteorologist
- synoptics
- synorogenic
- syntexis
- synthermal
- synthetic crude
