English abbreviations from syn to syw
- SYN (Stanton Airfield)
- Syn. (Synodus ("Synod"))
- SYN (TCP) (Synchronization)
- SYNC (Synchronization)
- SYNRE (Synthetic Seismic Report)
- SYO (Shonai Airport)
- SYP (Ruben Cantu Airport)
- SYPP (Seattle Young Person's Project)
- SYQ (Tobías Bolaños International Airport)
- SYQ-20 (Advanced Combat Direction System)
- SYQ-7 (NAVMACS system)
- SYR (Syracuse Hancock International Airport)
- SYRS (System Requirements Specification)
- SYS (Student Youth Society)
- SYSCOM (Systems Command)
- SYSCON (System Control)
- SYSEI (Synthetic Seismogram Log)
- SYSEX (System Exerciser)
- SYSGEN (System Generation)
- SYSK (Stuff You Should Know)
- Sysop (System operator)
- SYSTO (Systems Staff Officer)
- SYT (Shahab Yaqub Tuition)
- SYTC (Sandy Young Training Center)
- SYTO (Student & Youth Travel Organisation)
- SYV (Sylvester Airport)
- SYW (Seven Years War)
