| Engl.reg. | gluck | a gurgling sound; Swallow, 316 |
| Germ. | glucken | gobbling (turkey, 5) |
| Sbc. | glokotati | to sing (Capercaillie, 7) |
| Lat. | glocitare | to cackle (hen) |
| Pol. | gluk, gluch | Capercaillie, 7 |
| Czech | hluk | noise |
| Czech | hluceti | to make noise |
| Czech | hluchan | Capercaillie, 7 |
| Czech | hluSicek | Crested Lark, 299 (attribution certainement erronnée) |
| Sbc. | glogot | to gargle |
| Sbc. | glogonjaca | Bean Goose, 29 |
| Sbc. | glagòljiv | talkative |
| Ukr. | glogac | Great Spotted Woodpecker, 273 (from its drumming) |
| Sbc. | gluha | Nightjar, 251 |
| Sbc. | gluhac, gluvac | Wood Pigeon, 255 |
| Sbc. | gluhaç | Cormorant, 105 |
| Sbc. | gluhan, gluvar | Capercaillie, 7 |
| Bulg. | gluhar | Capercaillie, 7 |
| Alb. | gjuhë | language, speech |
| Alb. | giuhan | the birds: endowed with voice |
| Sbc. | gluhara, gluvara | domestic duck, 40 |
| Russian | gluharka | domestic duck, 40 |
| Pol. | zagluchaç | to deafen |
| Russian | gluxar | Great Black-headed Gull, 89 |
| Sbc. | gluvara | Domestic duck, 40 |
| Sbc. | gluvac | Wood Pigeon, 255 |
| Bulg. | glupak | Wood Pigeon, 255 |
| Bulg. | glupla | Turkey, 5 |
| Sbc. | gluparati | to say twaddles (> glupak, etc. "stupid") |
| Kashubian | klosawica | domestic duck, 40 |
| Ukr. | kluSa | Lesser Black-backed Gull, 82 |
| Russian | kluSa | Raven, 283; clucking hen |
| Ukr. | kluSka | clucking hen |
Russian (prob. | gluSa, kluSka | Great Black-headed Gull, 89 | |
| R.Rom. | cluotscha | Capercaillie, 7; clucking hen |
| Mod.Greek | klossa | clucking hen, 2 |
| Franç. | glousser | cackle (incubating hen) |
| Sbc. | gluSac | Wood Pigeon, 255; Great Grey Shrike, 324 |
| Bulg. | gluSec | Capercaillie, 7 |
| Lith. | gluSokas | Capercaillie, 7 |