| Subject | Spanish | English |
| gen. | arco iris | rainbow |
| life.sc. | arco iris blanco | mistbow |
| life.sc. | arco iris blanco | fogbow |
| life.sc. | arco iris blanco | white rainbow |
| life.sc. | arco iris blanco | fog bow |
| gen. | Arco Iris/Partido Comunista de los Países Bajos | Rainbow/Dutch Communist Party |
| gen. | Arco Iris/Partido Político de los Radicales | Rainbow/Radical Party |
| life.sc. | arco iris principal | primary rainbow |
| life.sc. | arco iris principal | primary bow |
| life.sc. | arco iris secundario | secondary rainbow |
| life.sc. | arco iris secundario | secondary bow |
| h.rghts.act., social.sc. | bandera arco iris | Rainbow Flag |
| h.rghts.act., social.sc. | bandera del arco iris | Rainbow Flag |
| fish.farm. | eperlano arco iris | American smelt (Osmerus mordax, Osmerus mordax mordax) |
| ichtyol. | eperlano arco iris Osmerus mordax | rainbow smelt |
| nat.res., fish.farm. | eperlano arco iris | rainbow smelt (Osmerus mordax) |
| polit. | Grupo Arco Iris | Rainbow Group in the European Parliament |
| gen. | Grupo Arco Iris del Parlamento Europeo | Rainbow Group in the European Parliament |
| gen. | Mesa del Grupo ARCO IRIS/ALE | Bureau of the ARC/ALE Group |
| gen. | Mesa del Grupo ARCO IRIS/GRAEL | Bureau of the ARC/GRAEL Group |
| social.sc. | Movimiento International de las Jornadas Arco Iris | International Rainbow Week Movement |
| fin. | opción arco iris | rainbow option |
| fish.farm. | sardina arco iris | slender rainbow sardine (Dussumieria acuta, Dussumieria productissima) |
| ichtyol. | sardina arco iris Dussumieria acuta | rainbow sardine |
| fish.farm. | sardina arco iris | round herring (Dussumieria acuta, Dussumieria productissima) |
| fish.farm. | sardina arco iris | rainbow sardine (Dussumieria acuta, Dussumieria productissima) |
| ichtyol. | sardina arco iris grácil Dussumieria elopsoides | slender rainbow sardine |
| ichtyol. | sardinas arco iris nep Dussumieria spp | rainbow sardines nei |
| fish.farm. | trucha arco iris | steelhead (Oncorhynchus mykiss, Salmo gairdneri, Salmo irideus) |
| ichtyol. | trucha arco iris Oncorhynchus mykiss | rainbow trout |
| fish.farm. | trucha arco iris | steelhead trout (Oncorhynchus mykiss, Salmo gairdneri, Salmo irideus) |
| fish.farm. | trucha arco iris | rainbow trout (Salmo gairdnerii, salmo irideus) |
| nat.res., fish.farm. | trucha arco iris | rainbow trout (Oncorhynchus mykiss, Salmo gairdneri, Salmo irideus) |
| gen. | Verdes Arco Iris | Greens/Rainbow Party |