| Anc.Greek | rhochâla | snoring |
| Mod.Greek | rhóchtos | sound of waves |
| Anc.Greek | rhachía | noise, tumult |
| Czech | rachot | noise, rolling |
| Franç. | rauque | raucous |
| Franç.rég. | roqueler, rocler | tousser, FEW 17: 449 |
| Franç.rég. | roclay | to croak |
| Engl. | ruckle | rattle |
| Engl. | ruckus | noisy commotion |
| Port. | rouca | Great Crested Grebe, 66; Least Bittern, 124 |
| Cat. | raucar | coasser |
| Ital.: Capri | ruocio | Rail, 142, 143 |
| Cat. | ruc | donkey |
| Esp.reg. | ruche | donkey, colt |
| Franç.Anniviers (VS) | rûtso | call of the Alpine Chough |
| Basque | arrukat | Rock Pigeon, 254 |
| Franç.: Lavedan | arrucá | pleurer, FEW 22: 61 |
| Ital.: Sic. | ruccalora | Rock Pigeon, 254 |
| Ital.: Sic. | rucculari | to coo; bark |
| Ital.: Cal. | rûcculo | grunt of the pig |
| Lith. | rucalotas | grumbler |
| Franç. | roucouler | to coo (pigeons) |
| Germ.(nd.) | rukke | to coo |
| Engl.: Scot. | ruckity-doo | Wood Pigeon, 255 |
| Engl.: Scot. | rooketty | cooing |
| Engl. | rook | Rook, 282 |
| Nederl. | roek | id. |
| Germ.reg. | rok et var. | id. |
| Svensk | roka | id. |
| Norsk | raake | id. |
| Germ. reg. | schrocke | Goosander, 61 |
| Nederl. | schrokker | Cormorant, 105 |
| Germ.:Vispert.(VS) | roekki | Jay, 290 |
| Germ.: Visperterm.(VS) | roekku | to cry |
| Germ.(a.litt.) | ruoho, hruoh | Jay, 290 (?) |
| Goth. | hruk, hrukjan | the cock's crowing |
| Scand. | hraukr | Cormorant, 105 |
| Lat. | eructare | to burp |
| Sbc. | rukarjel | Bee-eater, 265 |
| Lettish | rukt, ruciens | to roar |
| Lith. | rukti | to roar |
| Sln. | rukati | id. |
| Lith. | rukalé | Tawny Owl, 239 |
| Sbc. | drekalo | (prosth. /d/) Tawny Owl, 239 |