Hi, I think this link will help you greatly: http://www.wordbyletter.com/words_starting_with.php?q=a&letters=7 It lists a huge amount of words starting with a and having 7 letters. Hope that helps :)
areoles
KeepingKnelledKeelingKillersKingpinKnowing
yelling
That's an unusual question.
zoology
crinkle
Primper.
firepitfirefly
Certain
lightly
Noodles
egghead