2. Initialism. (US military nautical obsolete) Sub Surface Radar — a radar picket submarine ¹
3. Initialism. (aviation travel industry) Special Service Requirement (or Request). ¹
4. Initialism. Silent Sustained Reading ¹
5. Initialism. Seven Star Reaf ¹
6. Initialism. (nautical) Small Ships Register ¹
7. Initialism. (military) Special Support and Reconnaissance ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of SSR
SSID SSK SSKs SSL SSM SSMs SSN SSNRI SSNs SSO | SSP SSP31 protein kinase SSPE SSPX SSPs SSR (current term) SSRI SSRIB SSRN SSS | SSSI SST SSTH SSTO SSW ST STA START STB STBs |