No English Scrabble words meet the criteria, whether you interpret the "you" as an I or a U.
Thrashed?
There are no 8-letter words, but there are these 7-letter ones:detoursdourestloudestlustredoldsterredoutsroustedrustledstrudeltousled
some words include:pabulumspachadompachalicpachinkopachisispachoulipachucospacifiedpacifierpacifiespacifismpacifistpackablea full list of words beginning with P containing 8 letters can be found here (see related links), although this list doesn't include every 8 letter word containing the letter P.
"EMIGRATE"
An 8 letter word, with just one letter in it, is ENVELOPE. 8 letters in the word, 1 letter inside the envelope.
There is no 8-letter word, but there are several 7-letter words:agnaticanticarcartingcratinggranitatracing
You can get the word pyramids from those letters.
Exceeded
testiest
sextets
The letters spell the word audience. It is an 8 letter word.
Increase and illusion begin with and I and are 8 letters.