| Rydberg constant | Rydberg-Konstante |
| Rydberg formula | Rydberg-Formel |
| Rydberg frequency | Rydberg-Frequenz |
| Ryder Cup | Ryder Cup |
| Rydułtowy | Rydułtowy |
| Rydzyna | Rydzyna |
| rye | Korn |
| Rye beer | Roggenbier |
| rye bread | Pumpernickel |
| rye bread roll | Schusterjunge |
| rye breads | Roggenbrote |
| rye crop | Roggenernte |
| rye cultivation | Roggenanbau |
| rye dust | Roggenstaub |
| rye ergot fungus | Purpurbrauner Mutterkornpilz |
| rye farming | Roggenanbau |
| rye field | Roggenfeld |
| rye fields | Roggenfelder |
| rye filed | Roggenfeld |
| rye flour | Roggenmehl |
| rye germ oil | Roggenkeimöl |
| rye grain | Roggenkorn |
| rye grains | Roggenkörner |
| rye grass | Raigras |
| rye growing | Roggenanbau |
| rye harvest | Roggenernte |
| Rye House Plot | Algernon Sidney |
| rye produce | Roggenertrag |
| rye roll | Roggenbrötchen |
| rye starch | Roggenstärke |
| rye straw | Roggenstroh |
| rye whiskey | Roggenwhisky |
| rye yield | Roggenernte |
| Rye-bread | Roggenbrot |
| rye-field | Roggenfeld |
| rye-fields | Roggenfelder |
| Rye-grass | Lolch |
| rye-wheat bread | Mischbrot |
| ryefield | Roggenfeld |
| ryefields | Roggenfelder |
| ryegrass | Lolch |
| ryegrasses | Lolch |
| Ryerson University | Ryerson University |
| Ryhope | Ryhope |
| Ryki County | Powiat Rycki |
| Rykodisc | Rykodisc |
| Ryll-Nardzewski fixed-point theorem | Fixpunktsatz von Ryll-Nardzewski |
| Rymanów | Rymanów |
| rymovirus | Rymovirus |
| rymoviruses | Rymoviren |
| Rymättylä | Rymättylä |
| Ryn | Ryn |
| Ryo | Ryo |
| Ryo Kawasaki | Ryō Kawasaki |
| Ryo Mizuno | Ryō Mizuno |
| Ryoji Noyori | Ryoji Noyori |
| ryokan | Ryokan |
| Ryoko Hirosue | Ryōko Hirosue |
| Ryoko Tani | Ryōko Tani |
| Ryoko Yamagishi | Ryōko Yamagishi |
| Ryom Verzeichnis | Ryom-Verzeichnis |
| Ryongchon | Ryongchŏn |
| Ryongchon disaster | Zugunglück von Ryongchŏn |
| Rypin | Rypin |
| Rypin County | Powiat Rypiński |
| Rysy | Rysy |
| Ryszard Kapuściński | Ryszard Kapuściński |
| Ryszard Kukliński | Ryszard Kukliński |
| Ryta Turava | Ryta Turawa |
| Ryti-Ribbentrop Agreement | Ryti-Ribbentrop-Vertrag |
| Ryton | Ryton |
| Ryu Seung-Min | Ryu Seung-min |
| Ryuhei Kitamura | Ryūhei Kitamura |
| Ryuichi Sakamoto | Ryūichi Sakamoto |
| Ryukyu Islands | Ryūkyū-Inseln |
| Ryukyu mole | Ryukyu-Maulwurf |
| Ryukyu robin | Samtkehlchen |
| Ryukyu serpent eagle | Riukiuschlangenweihe perplexus) |
| Ryukyuan languages | Ryūkyū-Sprachen |
| Ryurik | Rurik |
| Ryuta Kawashima | Ryūta Kawashima |
| Ryutaro Hashimoto | Ryūtarō Hashimoto |
| Ryuteki | Ryūteki |
| Ryzhkov | Ryschkow |
| Ryōan-ji | Ryōan-ji |
| Ryū Murakami | Ryū Murakami |
| Ryūkotsusei | Ryukotsusei |
| Ryūkyū Islands | Ryūkyū-Inseln |
| Ryūkyū proper | Ryūkyū-Inseln |
| Ryūnosuke Akutagawa | Akutagawa Ryūnosuke |
| RZ | RZ |
| RZ powder | Roheisenzunderpulver |
| RZA | Robert Diggs |
| Rzeczpospolita | Rzeczpospolita |
| Rzepin | Rzepin |
| Rzeszów | Rzeszów |
| Rzeszów County | Powiat Rzeszowski |
| Rzeszów University | Universität Rzeszów |
| Rzgów | Rzgów |
| Rzhev | Rschew |
| R·Type | R-Type |
| Rába | Raab |
| Rádio e Televisão de Portugal | Rádio e Televisão de Portugal |
| Rákospalotai EAC | Rákospalotai EAC |
| Rán | Rán |
| Râmnicu Sărat | Râmnicu Sărat |
| Râmnicu Vâlcea | Râmnicu Vâlcea |
| Râşnov | Râşnov |
| Räbke | Räbke |
| Räckelwitz | Räckelwitz |
| Rätikon | Rätikon |
