stupendous
Marvelous.
Astonishing.
Amazing
Finish is another word for completion starting with the letter F.
Liberalness is another word for generosity starting with the letter L.
neat
Marvelous, magnificent, miraculous, majestic, moving, mirabile dictu, mirable, mirificial. Hope that helps.
Angelic, amiable, amicable, adorable, amazing...
recover
another archive
used
A seven-letter synonym for "astounding" is "amazing."