| tachigrafo | tachograph |
| tachimetro | speedometer |
| Taching am See | Taching am See |
| tachione | tachyon |
| tachistoscopio | tachistoscope |
| Tachov | Tachov |
| Tachyglossidae | Echidna |
| taci | shh |
| tacitiano | Tacitean |
| tacitismo | Tacitism |
| tacito | assumed |
| taciturno | taciturn |
| taciuto | unspoken |
| tackle | tackle |
| Tacloban | Tacloban City |
| Tacna | Tacna Region |
| taco | taco |
| Tacoma | Tacoma |
| Tacony | Tacony |
| Tacrolimus | Tacrolimus |
| Tacuarembó | Tacuarembó Department |
| Tacuina sanitatis | Tacuinum Sanitatis |
| Tacurong | Tacurong City |
| Tadahiro Nomura | Tadahiro Nomura |
| Tadalafil | Tadalafil |
| Tadamichi Kuribayashi | Tadamichi Kuribayashi |
| Tadao Ando | Tadao Ando |
| Tadarida teniotis | European Free-tailed Bat |
| Taddeo Zuccari | Taddeo Zuccari |
| Tadeusz Gajcy | Tadeusz Gajcy |
| Tadeusz Kantor | Tadeusz Kantor |
| Tadeusz Kościuszko | Tadeusz Kościuszko |
| Tadeusz Rydzyk | Tadeusz Rydzyk |
| Tadeusz Różewicz | Tadeusz Różewicz |
| Tadorna cristata | Crested Shelduck |
| Tadrart Acacus | Tadrart Acacus |
| Tadten | Tadten |
| Tae Hwan Park | Park Tae Hwan |
| Taekwondo | Taekwondo |
| Taenia saginata | Beef tapeworm |
| Taenia solium | Pork tapeworm |
| Taenite | Taenite |
| tafano | gadfly |
| Tafers | Tafers |
| tafferuglio | scrimmage |
| taffetà | taffeta |
| Tafi | Taphians |
| Tafofobia | Fear of being buried alive |
| Tafonomia | Taphonomy |
| Taganrog | Taganrog |
| Tagaste | Tagaste |
| Tagaytay | Tagaytay City |
| Tagbilaran | Tagbilaran City |
| Tage Erlander | Tage Erlander |
| Tagelmust | Tagelmust |
| Tagged Command Queuing | Tagged Command Queuing |
| Tagged Image File Format | Tagged Image File Format |
| tagico | Tajik |
| Tagiki | Tajiks |
| Tagikistan | Tajikistan |
| Tagiura | Tadjourah Region |
| taglia | size |
| taglia forte | outsize |
| taglia grande | outsize |
