Tend, thud, tied, toad, told, trod and turd are 4 letter words that start with T and end with D.
A seven letter word that starts with D and ends with T: decrypt
Tibet =D
A tea pot.
None do so.
Event.
Turnip
yacht.
One word that fits your criteria is "distant." It starts with the letter 'd,' ends with 't,' and contains seven letters.
tentacled
Parrot! :D
darkest