English abbreviations from syc to syn
- SYC (Save Your Children)
- SYD (Sydney Airport)
- SYDP (Six Year Defense Plan)
- SYE (Senior Year Experience)
- SYF (Silva Bay Seaplane Base)
- SYG (Springfield Youth Group)
- SYH (Sweeney Youth Homes)
- SYI (Shelbyville Municipal Airport (Bomar Field))
- SYJ (Sirjan Airport)
- SYL (Roberts Army Heliport)
- SYM (Stubbers Young Mariners Sailing club)
- SYN (Stanton Airfield)
- Syn. (Synodus ("Synod"))
