- trivial name
- trivium
- triweekly
- -trix
- -trixes
- tRNA
- tRNAs
- Troas
- Trobriand Islands
- Trocaire College
- decomposition
- decompound
- decompress
- decompression
- decompression chamber
- decompression illness
- decompression sickness
- decompression syndrome
- deconcentrate
- decondition
- decongest
- decongestant
- decongestants
- deconsecrate
- deconstruct