Not that I know of, but my dad had a close one, 7 letter word, negated.
ExpressoFalsettoFandango.
Question.
Hanukkah
astonish
avoidingbreakingcrawlingdrinkingenduringfloatingguessinghumoringinvitinglisteningmountingnoticingorderingpressingprintingquittingroastingstealingtreadingunendingvouchingwateringyielding
linguini
apparentaffluentrepresent
Copious
Olympiad
One example of an 8-letter word ending with "ing" is "starting." It refers to the act of beginning something or initiating a process.
yourself yourself
credenza