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- RPh RQ RRC RRT RS RSA RSD RSFSR RSI RSM RSO RSS RSV RSVP RSWC RTC RTN RTO RU-486 RV RVA RVSVP RVer RW Ra's Tannūrah Ra's at Tīb Raba Rabat Rabaul Rabbanist Rabbinic Hebrew Rabelais Rabelaisian
- Rabi al-Awwal Rabi al-Thani Rabin Race, Cape Rachel Rachianectes Rachiglossa Rachitomi Rachmaninoff Rachycentron RacibĂłrz Racine Rackham Racovian Radcliffe Radetzky Radical Republican Radicula Radiolites Radnor Radom Radopholus Rae Raeburn Raeder Raemaekers Raetia Raeto-Romance Rafah Raffaelesque Rafflesiaceae Rafsanjani Ragae
- Ragnarok Ragusa Rahanwein Rahway Raia Raiae Raiidae Raimondi Rainbow Bridge Rainier III Rainy Lake Raipur Rajab Rajagopalachari Rajahmundry Rajasthan Rajasthani Rajidae Rajkot Rajmahal creeper Rajmahal hemp Rajoy (Brey) Rajpoot Rajputana Rakahanga Ralegh Ralik Rallidae Rallus Rama Ramadan Ramadi Ramaism