rotogravure
Temperature
Underground is a 11 letter word starting with U and ending with D.
inquisitive
harpsichord
transfusion
There is no English 11-letter word you can make using all of the letters in accomplish and adding one more letter.
A ten letter word for the process is metabolism. An 11 letter word is respiration.
An 11 letter word having to do with sex is fornication.
Oh, dude, the longest word starting with the letter Y is "yttrium." It's like 7 letters long, so I hope you have the energy to say it all in one breath. But hey, at least now you can impress your friends at your next Scrabble game with your knowledge of obscure Y words.
The 11-letter word that refers to a type of anime is Planimeters.
Afghanistan.
An 11 letter word that refers to invading one's property is "trespassing".