One possibility is the word genesis.
Neptune
Bestows is a seven-letter word with w as the sixth letter.
Holiday is a seven letter word.
shuttle
What is a seven letter word with o as the sixth letter
Luggage, is a seven letter word for bags.
Duchess is a seven letter word.
A seven letter word for religious dissenter is heretic.
In my dictionary the seven letter word after fan is fanatic.
Hubble telescope is a space word. It begins with the letter h.
There's no seven letter word, here are the possible six letter words:atonernatronnonartornatetannertonner