| common informer | Sykophant |
| Common inn stay | Abteilung |
| Common Interface | Common Interface |
| Common Intermediate Format | Common Intermediate Format |
| Common Intermediate Language | Common Intermediate Language |
| common iora | Schwarzflügeliora |
| common jackal | Goldschakal |
| common jackals | Goldschakale |
| common jasmine | Echter Jasmin |
| common juniper | gewöhnlicher Wacholder |
| common kestrel | Turmfalke |
| common kidney vetch | Echter Wundklee |
| Common Kingfisher | Eisvogel |
| common kingsnake | Kettennatter |
| common knotgrass | Vogelknöterich |
| common knowledge | verbreitetes Wissen |
| common kusimanse | Dunkelkusimanse |
| common lackey | Gewöhnlicher Ringelspinner |
| common lackey moth | Gewöhnlicher Ringelspinner |
| common lady fern | Waldfrauenfarn |
| common land | Allmende |
| common language | Allgemeinsprache |
| common lavender | Echter Lavendel |
| common law | Gewohnheitsrecht |
| common law husband | Lebensgefährte |
| common law spouse | Lebenspartner |
| common law wife | Lebensgefährtin |
| common lilac | gemeiner Flieder |
| common limpet | Gemeine Napfschnecke |
| Common ling | Leng |
| common link | gemeinsames Glied |
| common linnet | Hänfling |
| common lionfish | indischer Rotfeuerfisch |
| Common Lisp Object System | Common Lisp Object System |
| common lobster | Europäischer Hummer |
| common logarithm | Briggscher Logarithmus |
| common long-nosed armadillo | Neunbinden-Gürteltier |
| common loon | Eistaucher |
| common lore | Allgemeingut |
| common lungwort | Adam und Eva |
| common maidenhair fern | buschiger Frauenhaarfarn |
| common mallow | Käsepappel |
| common man | Normalbürger |
| common management information protocol | CMIP-Protokoll |
| common management information service element | Allgemeines Management-Informationsdienstelement |
| common mandrake | Gemeine Alraune |
| common maple | Feldahorn |
| common marigold | Ringelblume |
| common market | Gemeinsamer Markt |
| Common Market for Eastern and Southern Africa | Gemeinsamer Markt für das Östliche und Südliche Afrika |
| Common Market tourists | Besucher aus EU-Ländern |
| common marmoset | Weißbüschelaffe |
| common marsh orchid | breitblättrige Fingerwurz |
| common marshmallow | Echter Eibisch |
| common meadow violet | Amerikanisches Schmetterlingsveilchen |
| Common Medlar | Mispeln |
| common melilot | gelber Steinklee |
| common melipotes | Aschbrust-Honigfresser |
| Common Merganser | Gänsesäger |
| common mica | Muskovit |
| common Michaelmas daisy | Weidenblatt-Aster |
| common migraine | gewöhnliche Migräne |
| Common Milkweed | Gewöhnliche Seidenpflanze |
| common miner | Kaninchenerdhacker |
| common mini-miner | Kleine Sandbiene |
| common mini-mining bee | Kleine Erdbiene |
| common mining bee | Kleine Erdbiene |
| common mining-bee | Kleine Erdbiene |
| common minke whale | Nördlicher Zwergwal |
| common minnow | Elritze |
| common mistletoe | Weißbeerige Mistel |
| common mode | Gleichtakt |
| common mode choke | Gleichtaktdrossel |
| common mode choke, CMC | stromkompensierte Drossel |
| common mode distortion | Gleichtaktverzerrung |
| common mode driving | Gleichtaktsteuerung |
