| Cymric | plwng | action of diving |
| Franç. | plonger | to dive |
| Lettish | pludums | to sink |
| Basque | plunp! | plop!; a plunge |
| Basque | plumpada | a plunge |
| Germ.reg. | plompert | Osprey, 203 (dives on its prey) |
| Engl. | plump, plompe | a plunge, a ducking; a heavy shower |
| Engl. | plummet | to fall vertically |
| Engl. | plumb | vertical. No relation to the metal plomb "lead"; a plumb line is not necessarily weighted with lead |
| Franç. | plomb (à) | vertically |
| Franç. | fil à plomb | plum line, fil indiquant la verticale (non pas de plomb "métal"; ce fil n'est pas nécessairement lesté de plomb, mais d'un poids quelconque |
| Franç.rég. | plombe à rates | Kestrel, 234 (dives vertically on its prey) |
| Breton | pluma, plumia | action of diving; plumier, pluier divers, 63-65 |
| Franç.: wall. | plomion | divers, 63-65 |
| Ital.nord | plombin, piumbin | Kingfisher, 267 |
| R.Rom. | plombina | Tufted Duck, 48 |
| Ital. | piombare | to fall plumb |
| Ital.: Otr. | chiumbaluru | Kingfisher, 267 |
| Ital.: Cal. | chiummareddu | Kingfisher, 267 |