Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| azoic | lacking life, esp of geological period. |
| carboniferous | bearing carbon. |
| cenozoic | relating to the most recent geologic era. |
| devonian | relating to a type of rock formed in the fourth period of the Palaeozoic era. |
| eocene | of rock formed in the second epoch of the Tertiary geological period. |
| holocene | relating to the second and most recent epoch of the Quaternary period. |
| jurassic | relating to the second period of the Mesozoic era. |
| liassic | of, relating to, or being a subdivision of the European Jurassic. |
| mesozoic | of the Secondary geological period, including the Triassic, Jurassic, and Cretaceous systems. |
| miocene | denoting the fourth epoch of the Tertiary period. |
| neogene | relating to the Miocene or Pliocene epochs. |
| neolithic | the later, more advanced, Stone Age. |
| oligocene | belonging to a certain geological time period. |
| palaeolithic | of the earlier Stone Age. |
| paleocene | belonging to a certain geological time period. |
| paleogene | belonging to a certain geological time period. |
| paleolithic | of or relating to the earliest period of the Stone Age characterized by rough or chipped stone implements. |
| paleozoic | belonging to a certain geological time period. |
| permian | relating to the last period of the Palaeozoic era. |
| pleiocene | of the Pliocene geological time period. |
| pliocene | of the Pliocene geological time period. |
| silurian | formed in the third period of the Palaeozoic. |
| triassic | relating to the first period of the Mesozoic era. |