discard
A seven letter word that starts with D and ends with T: decrypt
dogging
Rounded
paddledpanicedparchedpatchedpeddledperchedplannedpleadedplaguedpleasedpraisedprepaidpretendproceedpunched
darkest
One word that fits your criteria is "distant." It starts with the letter 'd,' ends with 't,' and contains seven letters.
claimed, cheated, colored
* dresser * drainer * drummer * drifter * doubter * divider * deliver * drinker
watched.
dad
unoccupied
Darshan and duramen are the seven letters word that start with D and end with N.