| Sinclair Islet | Sinclair Islet (Queensland) | Sinclair Islet, Queensland |
| Sinclair Knight Merz | Sinclair Knight Merz Ltd. | Sinclair Lake |
| Sinclair Lane | Sinclair Lewis | Sinclair Lewis Boyhood Home |
| Sinclair Loading Rack | Sinclair Loki | Sinclair Ltd v Versailles Ltd |
| Sinclair Mayne | Sinclair McKnight Stevens | Sinclair method |
| Sinclair Method | Sinclair Microdrive | Sinclair microdrive |
| Sinclair Miller | Sinclair Mills railway station | Sinclair Mills station |
| Sinclair Mills, British Columbia | Sinclair MK14 | Sinclair Mountain |
| Sinclair MTV-1 | Sinclair MTV1 | Sinclair Oil |
| Sinclair Oil & Refining Corporation | Sinclair Oil and Refining Company | Sinclair Oil Building |
| Sinclair Oil Building (Fifth Avenue) | Sinclair Oil Building (Liberty Street) | Sinclair Oil Building (Manhattan) |
| Sinclair Oil Building (Rockefeller Center) | Sinclair Oil Company Building | Sinclair Oil Corporation |
| Sinclair OPD | Sinclair Oxford | Sinclair Oxford 100 |
| Sinclair Oxford 200 | Sinclair Oxford 300 | Sinclair Oxford Scientific |
| Sinclair Oxford Universal | Sinclair Park | Sinclair Pass |
| Sinclair PC 200 | Sinclair PC200 | Sinclair PC500 |
| Sinclair President | Sinclair President Scientific | Sinclair Programs |
| Sinclair QDOS | Sinclair Qdos | Sinclair QL |
| Sinclair ql | Sinclair QL character set | Sinclair QL Microdrive |
| Sinclair QL Software | Sinclair QL software | Sinclair Quantum Leap |
| Sinclair Radio of Seattle Licensee, LLC | Sinclair Radionics | Sinclair Radionics Ltd |
| Sinclair Refining Company | Sinclair Research | Sinclair research |
| Sinclair Research C5 | Sinclair Research Limited | Sinclair research ltd |
| Sinclair Research Ltd | Sinclair Research Ltd. | Sinclair River |
| Sinclair Ross | Sinclair School of Nursing | Sinclair Scientific |
| Sinclair Scientific Programmable | Sinclair score | Sinclair Secondary School |
| Sinclair Service Station | Sinclair Service Station (disambiguation) | Sinclair Service Station (Ridgeland, South Carolina) |
| Sinclair Service Station (Spring Hill, Florida) | Sinclair Service Station (Tulsa, Oklahoma) | Sinclair Skinner |
| Sinclair Smith | Sinclair Smith (astronomer) | Sinclair Smith (cricketer) |
| Sinclair Smith (disambiguation) | Sinclair Sovereign | Sinclair Spectrum |
| Sinclair Stevens | Sinclair Stevenson | Sinclair Stevenson Ltd |
| Sinclair Thomas | Sinclair Thomson | Sinclair Township |
| Sinclair Township (disambiguation) | Sinclair Township, Clearwater County, Minnesota | Sinclair Township, Jewell County, Kansas |
| Sinclair Township, Minnesota | Sinclair Township, MN | Sinclair Traill |
| Sinclair Treadway | Sinclair tribune merger | Sinclair Trucking Company |
| Sinclair TV80 | Sinclair User | Sinclair v Brougham |
| Sinclair Vehicles | Sinclair Vehicles Ltd | Sinclair W. Burgener |
| Sinclair Walter "Clair" Burgener | Sinclair Walter Burgener | Sinclair Weeks |
| Sinclair Wetlands | Sinclair Whittaker | Sinclair Wrist Calculator |
| Sinclair Wristwatch Calculator | Sinclair X-1 | Sinclair X-10 |
| Sinclair Zike | Sinclair ZX Microdrive | Sinclair ZX Printer |
| Sinclair ZX spectrum | Sinclair ZX Spectrum | Sinclair ZX Spectrum 48K |
| Sinclair ZX Spectrum Vega+ | Sinclair ZX-80 | Sinclair ZX-81 |
| Sinclair ZX80 | Sinclair ZX81 | Sinclair ZX83 |
| Sinclair's aphelandra | Sinclair's longhorn | Sinclair's script |
| Sinclair's Spur, Wisconsin | Sinclair's stingaree | Sinclair, Adam |
| Sinclair, Alexander | Sinclair, Alice | Sinclair, Andrea |
| Sinclair, Andrew | Sinclair, Anthony | Sinclair, Arthur |
| Sinclair, Brian | Sinclair, Charles | Sinclair, Chris |
| Sinclair, Clive | Sinclair, Daniel | Sinclair, David |
| Sinclair, Dennis | Sinclair, Donald | Sinclair, Elizabeth |
| Sinclair, Eric | Sinclair, Frank | Sinclair, George |
| Sinclair, George, d. 1696 | Sinclair, Hamilton and Company | Sinclair, Harold |
| Sinclair, Harry | Sinclair, Henry | Sinclair, Hugh |
| Sinclair, Ian | Sinclair, Inc. | Sinclair, Iowa |
| Sinclair, James | Sinclair, Jim | Sinclair, John |
| Sinclair, Jonathan | Sinclair, Keith | Sinclair, Maine |
| Sinclair, Manitoba | Sinclair, Margaret | Sinclair, Mark |
| Sinclair, Martin | Sinclair, Mary | Sinclair, Mary Craig |
| Sinclair, Michael | Sinclair, Nicholas | Sinclair, Oliver |
| Sinclair, Patrick | Sinclair, Peter | Sinclair, Richard |
| Sinclair, Robert | Sinclair, Rooney & Co. Building | Sinclair, Stephen |
| Sinclair, Steve | Sinclair, Suzanne | Sinclair, Taffy |
| Sinclair, Thomas | Sinclair, Tom | Sinclair, Upton, 1878-1968 |
| Sinclair, West Virginia | Sinclair, William | Sinclair, WY |
| Sinclair, Wyoming | Sinclair-Burgess, William | Sinclair-Lockhart baronets |
| Sinclair-Lockhart Baronets | Sinclair-Scott (automobile) | Sinclair-Stevenson |
| Sinclair-Stevenson Ltd | Sinclair-Tribune | Sinclair-Tribune merger |
| Sinclair–Tribune merger | Sinclaire | Sinclaire Johnson |
| Sinclaire Miramontez | Sinclaire, William | Sinclairia |
| Sinclairia hintoniorum | Sinclairiopsis | Sinclairoceras |
| Sinclairs Bay | Sinclairs Hotels Limited | Sinclairsholm Castle |
| Sinclairtown | Sinclairtown railway station | Sinclairville |
| Sinclairville, New York | Sinclairvisan | Sinclar |
| Sinclavier | Sinclética Torres | Sincock |
| Sincock, Andrew | Sincock, David | Sincock, Peter |
| Sincomen | Sincopa | Sincora Antwren |
| Sincora antwren | Sincoraea | Sincoraea heleniceae |
| Sincoraea navioides | Sincorá antwren | Sincorá Antwren |
| Sincos District | Sincosite | Sincostan |
| Sincoumar | Sincronía | Sincronizada |
| Sincrotron | Sinctuary | Sincuba, Daniel |
| Sincura | Sincurarine | Sinczyca |
| Sinczyk-Lesniczowka | Sind | Sind & Punjab |
| Sind & Punjab Bank | Sind (caliphal province) | Sind (disambiguation) |
| Sind (historical) | Sind (script) | Sind A cricket team |
| Sind and Punjab | Sind and Punjab Bank | Sind Azad Party |
| Sind B cricket team | Sind bat | Sind Bat |
| Sind Club | Sind cricket team | Sind danio |
| Sind Danio | Sind Division | Sind Horse |
| Sind ibn Ali | Sind Ittehad Party | Sind Jerdon's Babbler |
| Sind Jungle Sparrow | Sind jungle sparrow | Sind kings |
| Sind krait | Sind Legislative Assembly | Sind legislative assembly election, 1937 |
| Sind Longnose Sand Snake | Sind Mail | Sind Medical College |
| Sind monarchs | Sind Nightjar | Sind Province |
| Sind province | Sind Province (1936-1955) | Sind province (1936-1955) |
| Sind Province (1936-47) | Sind Province (1936-55) | Sind Province (1936–1955) |
| Sind province (1936–1955) | Sind Province (1936–55) | Sind Regiment |
| Sind River | Sind River (Yamuna) | Sind River snake |
| Sind River Snake | Sind Sagar Doab | Sind sardinella |
