| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| English |
| English | sastruga | long wavelike snow ridge | n | AHD LRC |
| English | catarrh | mucous membrane inflammation | n | AHD W7 LRC |
| English | diarrhea | abnormally frequent intestinal discharge | n | AHD W7 LRC |
| English | hemorrhoid | mass of veins in swollen tissue at/within anal margin | n | AHD W7 LRC |
| English | maelstrom | powerful (often violent) whirlpool | n | AHD W7 LRC |
| English | rheo- | flow, current | pfx | AHD W7 LRC |
| English | rheum | watery discharge from mucous membranes | n | AHD W7 LRC |
| English | rhyolite | acid volcanic rock: lava form of granite | n | AHD W7 LRC |
| English | rhythm | recurrent alternation of strong/weak elements in sound | n | AHD W7 LRC |
| English | rhyton | ancient hornlike drinking vessel | n | AHD LRC |
| English | -rrhea | flow, discharge | n.sfx | AHD W7 LRC |
| English | stream | body of moving water | n | AHD W7 LRC |
| English | stream | to flow (as if) in stream | vb | W7 LRC |
| Old English | strēam | stream | n.masc | LRC |
| Middle English | diaria | diarrhea | n | W7 LRC |
| Middle English | reume | rheum | n | W7 LRC |
| Middle English | -ria | -rrhea | n.sfx | W7 LRC |
| Middle English | streme | stream | n | W7 LRC |
| West Germanic |
| Old Frisian | strām | stream | n | ASD LRC |
| Dutch | maalstroom | maelstrom | n | W7 LRC |
| Dutch | stroom | stream, current | n | TLL LRC |
| Old Saxon | strom | stream | n | ASD LRC |
| Old High German | stroum, strūm | stream | n | W7 ASD LRC |
| German | Rhyolith | rhyolite | n | W7 LRC |
| German | Strom | stream; electric current | n.masc | LRC |
| German | Strömung | stream, current | n.fem | TLL LRC |
| North Germanic |
| Icelandic | straumr | stream | n | ASD LRC |
| Danish | strøm | stream, current | n | TLL LRC |
| Swedish | ström | stream, current | n | TLL LRC |
| Italic |
| Latin | haemorrhoidae | hemorrhoids | n.fem.pl | W7 LRC |
| Latin | rheuma | flux of the sea | n.neut | W7 LRC |
| Latin | rhythmus | rhythm | n.masc | W7 LRC |
| Late Latin | catarrhus | catarrh | n.masc | W7 LRC |
| Late Latin | diarrhoea | diarrhea | n.fem | W7 LRC |
| Late Latin | -rrhoea | flowing | sfx | W7 LRC |
| Middle French | catarrhe | catarrh | n.masc | W7 LRC |
| Middle French | hemorrhoides | hemorrhoids | n.fem.pl | W7 LRC |
| Middle French | reume | flu, cold | n.masc | W7 LRC |
| French | rhythme | rhythm | n.masc | W7 LRC |
| Balto-Slavic |
| Russian | struga | deep place | n | AHD LRC |
| Hellenic |
| Homeric Greek | κατα-ρρέω | to flow down | vb | LRC |
| Homeric Greek | ῥέω | to flow, stream, gush | vb | LS LRC |
| Homeric Greek | ῥόος | flow, stream, current | n | LRC |
| Greek | haimorrhoos | flowing with blood | adj | W7 LRC |
| Greek | δια-ρρέω | to flow through | vb | LRC |
| Greek | dia-rrhoia | diarrhea, lit. flowing through | n.fem | W7 LRC |
| Greek | kata-rrhous | that flows; re: influenza | adj | W7 LRC |
| Greek | rheuma | flow, flux | n.neut | W7 LRC |
| Greek | rhoia | flux, flow | n.fem | W7 LRC |
| Greek | -rrhoia | flowing | sfx | W7 LRC |
| Greek | rhyax | stream (of lava) | n | W7 LRC |
| Greek | rhythmos | rhythm | n.masc | W7 LRC |
| Greek | ῥῠτός | fluid, liquid, flowing | adj | LS LRC |
| Indo-Iranian |
| Sanskrit | sarati | to flow | vb | W7 LRC |