The answer lies in the question. your required word is "seven letter", as it contains eleven letters.
Therein: the, he, her, here, there, ere, rein, in, therein, herein.
therein
herein
Purchasing
therein
therein
therein
Heroin
therein
therein
THEREIN
An anagram server enables people all around the word to indulge in their delight in the manipulation and rearrangement of letters and words. Servers provide vast lists of anagrams derived from words taken from a multitude of languages internationally. Servers show how using the letters from a word can be rearranged to form a new word or words from one phrase can be rearranged to make a new phrase without the individual having to work out the solution for themselves.
herein herein
If you write April 26, 2011, this contains only 5 letters, but unfortunately also contains numbers...
Herein
Your furniture will get rearranged for ya without you doing a thing.