doneness, nonsense, soddened
There are no 8-letter words, but there are these 7-letter ones:detoursdourestloudestlustredoldsterredoutsroustedrustledstrudeltousled
I can not identify any 8 letter words. However, the letters do spell the 7 letter words agendas and savaged.
The 4 letter words with the letters q u and d in it include:quadquid
You can get the word pyramids from those letters.
purified
Can't make an 8 letter word with 7 letters. Interestingly enough, you can make "idiot" from those letters. Also, you can make these:5 Letter Scrabble Wordsidiotiodid4 Letter Scrabble Wordsdidodiptdoittipitopi3 Letter Scrabble Wordsdiddipditdotoddoptpitpodpoipottiptodtop2 Letter Scrabble Wordsdoiditodoioppitito
silent letters
The letters can be used to spell the 8 letter words deviator, durative, garroted and outdared. They also spell outdrive, outraged and outrider.
There are no 5 letter words containing the letters a b c d and e. The 6 letters words backed, braced and cabled include the letters a b c d and e.
dewdrop
Some five letter words using DER are:adderalderciderderbyeiderelderodderolderorderriderudderunderwaderwider
The letters can be used to spell the 8 letter words deviator, durative, garroted and outdared. They also spell outdrive, outraged and outrider.