| think fit | ser apropiado |
| think highly of | admirar |
| think much of | admirar |
| think of | opinar acerca de |
| think out | analizar |
| think over | reflexionar |
| Think tank | Think tank |
| think the world of | admirar |
| think through | analizar |
| think twice about it | pensar algo dos veces |
| think up | concebir |
| think well of | consentir |
| thinkable | concebible |
| thinker | pensador |
| thinking | reflexión |
| Thinking machine | Computadora |
| thinly | escurrido |
| thinner | más enrarecido |
| thinning | dilución |
| Thiol | Tiol |
| Thionyl chloride | Cloruro de tionilo |
| thiosulfate | tiosulfato |
| Thiotimoline | Tiotimolina |
| thioxanthene | tioxanteno |
| third | tercero |
| Third Age | Tercera Edad del Sol |
| Third Amendment to the United States Constitution | Tercera Enmienda a la Constitución de los Estados Unidos |
| Third Battle of Kharkov | Tercera Batalla de Jarkov |
| Third Battle of the Aisne | Batalla de Axona |
| Third bridge guitar | Guitarra de tres puentes |
| Third Council of Constantinople | Tercer Concilio de Constantinopla |
| Third Council of the Lateran | Concilio de Letrán III |
| Third Council of Toledo | III Concilio de Toledo |
| Third Crusade | Tercera Cruzada |
| Third dynasty of Egypt | Dinastía III de Egipto |
| Third Dynasty of Ur | Renacimiento sumerio |
| Third Epistle of John | Tercera epístola de Juan |
| Third gender | Tercer sexo |
| Third Girl | La tercera muchacha |
| Third Intermediate Period of Egypt | Tercer periodo intermedio de Egipto |
| Third Italian War of Independence | Guerra de las Siete Semanas |
| Third Macedonian War | Guerras Macedónicas |
| Third Mithridatic War | Tercera Guerra Mitridática |
| Third normal form | Tercera forma normal |
| third party | tercera persona |
