| Subject | English | French |
| transp. | base and sub-base | couche de base et couche de fondation |
| construct. | gravel sub-base | couche de fondation en gravier |
| construct. | sand-gravel/slag mix for the sub-base | grave-laitier de fondation |
| construct. | sub-base | assise |
| construct. | sub-base | couche anti-contaminante |
| construct. | sub-base | couche filtre |
| construct. | sub-base | sous-couche anticapillaire |
| industr. | sub-base | couche de forme |
| transp., construct. | sub-base | infrastructure |
| industr. | sub-base | assise de chaussée |
| construct. | sub-base | sous-couche de protection |
| construct. | sub-base | couche de fondation |
| construct. | sub-base | sous-couche anti-contaminante |
| construct. | sub-base | couche de protection |
| construct. | sub-base | remblai |
| construct. | sub-base | sous-couche |
| agric., polit. | sub-base area | sous-superficie de base |
| transp., polit. | sub-base course | couche portante inférieure |
| transp., construct. | sub-base gravel | grave pour couche anti-gel |
| transp., construct. | sub-base reinforcement | moellons |
| transp., construct. | sub-base reinforcement | moellons ou blocs |
| transp., construct. | sub-base reinforcement | noyau dur |
| transp., construct. | sub-base reinforcement | blocs |
| transp., construct. | sub-base reinforcement | blocage |
| transp., construct. | the roadbase carries the carriageway surfacing /road surface/ and rests on the sub-base | la couche de base supporte la couche de surface et repose sur la couche de fondation |