| catalanidad | Catalanness |
| catalanismo | Catalanism |
| catalanización | Catalanization |
| catalanizar | Catalanize |
| catalanofobia | Catalanophobia |
| catalasa | catalase |
| catalejo | binoculars |
| catalepsia | trance |
| Catalepsia Proyectiva | Sleep paralysis |
| Catalina | Katherine |
| Catalina Cruz | Catalina Cruz |
| Catalina de Alejandría | Catherine of Alexandria |
| Catalina de Aragón | Catherine of Aragon |
| Catalina de Austria | Catarina of Spain |
| Catalina de Bora | Katharina Luther |
| Catalina de Foix | Catherine of Navarre |
| Catalina de Lancaster | Katherine of Lancaster |
| Catalina de Portugal | Catherine of Braganza |
| Catalina de Ricci | Catherine of Ricci |
| Catalina de Roet-Swynford | Katherine Swynford |
| Catalina de Sajonia-Lauemburgo | Catherine of Saxe-Lauenburg |
| Catalina de Siena | Catherine of Siena |
| Catalina de Suecia | Catherine of Vadstena |
| Catalina de Valois | Catherine of Valois |
| Catalina de Württemberg | Princess Catharina of Württemberg |
| Catalina Howard | Catherine Howard |
| Catalina I de Rusia | Catherine I of Russia |
| Catalina II de Rusia | Catherine II of Russia |
| Catalina Jagellón | Catherine Jagellonica of Poland |
| Catalina Karlsdotter | Catherine of Bjurum |
| Catalina Micaela de Austria | Catherine Michelle of Spain |
| Catalina Parr | Catherine Parr |
| Catalina Sandino | Catalina Sandino Moreno |
| Catalina Sforza | Caterina Sforza |
| Catalina Stenbock | Katarina Stenbock |
| Catalina Sunnesdotter | Catherine of Ymseborg |
| Catalina Vasa | Catharina of Sweden |
| Catalinita Couric de Monahan | Katie Couric |
| catalizador | catalyst |
| Catalizador Ziegler-Natta | Ziegler-Natta catalyst |
| catalizadores | catalyst |
| catalizar | catalyze |
| catalogación | listing |
| catalogar | categorize |
| catalogar como | stamp as |
| catalogo | list |
| Catalpa bignonioides | Southern Catalpa |
| Cataluña | Catalonia |
| Cataluña Septentrional | Northern Catalonia |
