The letters spell listlessness. The word uses all 12 letters.
Successfully is a 12 letter word with three set of double letters. Stubbornness is another 12 letter word.
Lighthearted is a 12 letter word. Lithographed is another 12 letter word that starts with L and ends with D.
The word biochemistry contains 12 letters.
There are total of 12 letters in the American spelling of this word.
The only English word I could find that meets the criteria is candleholder, but I am not sure it is a hospital helper.
The word is contemporary (12 letters) or contemporaries (14 letters).
No letters or word provided to unscramble.