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- RR Lyrae
- RSA algorithm
- RSGC1
- Ruanruan
- Rubber
- Rubén Blades
- Rubiaceae
- Rubidium
- Rubik's Cube
- RuBisCO
- Ruble
- Ruby Bridges
- Rudolf Anderson
- Rudolf Höss
- Rudolf Virchow
- Rudolph Boysen
- Rudy Giuliani
- Rudy Rucker
- Rugby
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- Rugby union
- Rügen Rural District
- Ruhleben P.O.W. Camp
- Rui Patrício
- Ruins
- Ruislip
- Rula Lenska
- Ruler
- Rules for the Direction of the Mind
- Rum-running
- Rumba
- Rumbia LRT Station
- Rumi
- Rumiko Takahashi
- Ruminant
- Rumor
- Rumpelstiltskin
- Run (island)
- Run, Fat Boy, Run
- Rúnar Kristinsson
- Runaway Brain
- Runaways (comics)
- Runcorn
- Runes
- RuneScape
- Running
- Runnymede
- Rupert Everett
- Rupert Murdoch
- Rupert Sheldrake
- Rural districts of Germany
- Rus' (people)
- Ruse Province
- Rush County, Kansas
- Rush discography
- Ruslan Salei
- Ruslana
- Russ Meyer
- Russell County, Kansas
- Russia
- Russian Civil War
- Russian Empire
- Russian Football National League
- Russian Grand Prix
- Russian Ground Forces
- Russian language
- Russian Orthodox Church
- Russian presidential election, 2012
- Russian Revolution
- Russian ruble
- Russian Social Democratic Labour Party
- Russian Space Forces
- Russian Women's Football Championship
- Russo-Japanese War
- Rustavi
- Rusty Crawford
- Rusty-spotted cat
- Rusudan Gotsiridze
- Rusyn language
- Ruth Asawa
- Ruth Buzzi
- Ruth Langsford
- Rutherford B. Hayes
- Rutherfordium
- Ruwer (municipality)
- Rwanda
- Rwandan genocide
- Ryan Braun
- Ryan Higa
- Ryan Howard
- Ryan Kwanten
- Ryan Miller
- Ryan Ross
- Ryan Russell
- Ryan Seacrest
- Ryan Stiles
- Ryan Zinke
- Rydberg constant
- Ryder Cup
- Rye
- Ryszard Kaczorowski
- Ryūe Nishizawa
- Ryūjin
- Ryūkyū Domain
- Ryūsaku Tsunoda
- s-block
- S.A.S.
- S.H.E
- S.L. Benfica
- S.P.A.L. 1907
- S1m0ne
- S4C
- S7 Airlines
- Saadat Shahr
- Saalburg
- Saale
- Saar at the 1952 Summer Olympics
- Saar River
- Saaremaa
- Saarland
- Saarland national football team
- Saarpfalz District
- Sabana Cruz, Elías Piña
- Sabana Larga, Elías Piña
- Sabaneta, Santiago Rodríguez
- Sabbath (disambiguation)
- Sabbath in Christianity
- Sabellianism
- Sabena Flight Academy
- Saber–toothed cat
- Sabirabad (city)
- Sabre
- Sabrina Carpenter
- Sacagawea
- Sacha Baron Cohen
- Sachin Tendulkar
- Sächsische Schweiz (district)
- Sächsische Schweiz (tourism)
- Sacking of Lawrence
- Sacrament of marriage
- Sacramento, California
- Sacred Band of Thebes
- Sacred cow
- Sacred fig
- Sacred Heart
- Sacred kingfisher
- Sacred site
- Sacrum
- Sadae
- Sadao Munemori
- Saddam Hussein
- Saddleback toad
- Sadie Frost
- Sadiq Khan
- Sadler's Wells Theatre
- Sadness
- Şafak Pavey
- Safashahr
- Safety razor
- Safeway Inc.
- Saffir–Simpson Hurricane Wind Scale
- Saffron
- Saffron cod
- Sag DEG
- Saga
- Saga Prefecture
- Sagarmatha Zone
- Sagittarius (astrology)
- Sagittarius A
- Sagittarius A*
- Sagrada Família
- Sagwa, the Chinese Siamese Cat
- Sahaba
- Sahara
- Sahara pump theory
- Sahelanthropus
- Sahi al-Bukhari
- Sahi Muslim
- Sahibzada Ajit Singh Nagar district
- Sai Pallavi
- Saigon River
- Saikaidō Seamounts
- Sailing
- Sailing (sport)
- Sailor Moon
- Saina Nehwal
- Saint
- Saint Barthélemy
- Saint Clare of Assisi
- Saint David's Day
- Saint George
- Saint Helena
- Saint Helena plover
- Saint Helena, Ascension and Tristan da Cunha
- Saint John Parish, Dominica
- Saint Kitts and Nevis
- Saint Louis IX of France
- Saint Lucia
- Saint Lucia at the Olympics
- Saint Matthias
- Saint Nicholas
- Saint Patrick
- Saint Patrick's Day
- Saint Peter
- Saint Petersburg
- Saint Petersburg Conservatory
- Saint Petersburg Philharmonic Orchestra
- Saint Petersburg Stadium
- Saint Roch
- Saint Valentine
- Saint Vincent amazon
- Saint Vincent and the Grenadines
- Saint Vincent and the Grenadines at the Olympics
- Saint Walburga
- Saint-Denis
- Saint-Flour, Cantal
- Saint-Gaudens, Haute-Garonne
- Saint-Gilles, Belgium
- Saint-Girons, Ariège
- Saint-Jean-d'Angély
- Saint-Laurent-du-Maroni
- Sainte Chapelle
- Saintes, Charente-Maritime
- Saintpaulia
- Saints Cyril and Methodius
- Saints Row (series)
- Saipan
- Saitama, Saitama
- Sakanoue no Tamuramaro
- Sakha Republic
- Sakis Rouvas
- Sala São Paulo
- Salad
- Salade niçoise
- Saladin
- Salah ad Din Province
- Salamander
- Salamandroidea
- Sale
- Sale Sharks
- Salem (TV series)
- Salem Witch Trials
- Salesforce Tower
- Salients, re-entrants and pockets
- Salina, Kansas
- Saline County, Kansas
- Saline River (Kansas)
- Salisbury Cathedral
- Salisbury Plain
- Salisbury, Connecticut
- Salivary gland
- Salivary gland neoplasm
- Salle Le Peletier
- Sally Beamish
- Sally Carman
- Sally Kirkland (editor)
- Salman Rushdie
- Salmon
- Salmon (color)
- Salmon P. Chase
- Salmonidae
- Salome
- Salon Basnet
- Salon du livre aéronautique
- Salp
- Salsa
- Salt
- Salt evaporation pond
- Salt lake
- Saltaire
- Saltasaurus
- Saltash
- Salto Department
- Saltsjöbaden
- Saltwater crocodile
- Saludos Amigos
- Salvador Allende
- Salvador de Madariaga
- Salvador Luria
- Salvage
- Salvaleón de Higüey
- Salvia
- Salwar kameez
- Salzburg
- Salzburger Nockerl
- Sam & Cat
- Sam and Friends
- SAM Colombia Flight 501
- Sam Cooke
- Sam Francis
- Sam J. Jones
- Sam Koch
- Sam Totman
- Sam Warburton
- Samael
- Samak Sundaravej
- Samaná Bay
- Samaná Province
- Samantha Bee
- Samaritan Pentateuch