Inventing, investing.
One example of an 8-letter word ending with "ing" is "starting." It refers to the act of beginning something or initiating a process.
understating
avoidingbreakingcrawlingdrinkingenduringfloatingguessinghumoringinvitinglisteningmountingnoticingorderingpressingprintingquittingroastingstealingtreadingunendingvouchingwateringyielding
dieting
Wrung, Slang
rushing, sorting, falling
Matching
A nine letter word using those letters is boomerang.
The word that can end in "ing" and relates to day is "daydreaming."
Feeling has seven letters... But a feeling could be hurting
"Parenting."
what words end with ing for sun