Common words that rhyme with dappy include unhappy, snappy, zippy, nippy, duppy, occupy, ropy, copy, therapy, derpy, jumpy, sleepy, preoccupy, syrupy and raspy.
He seemed unhappy with the outcome.
Are you happy or just pretending?
She drove a zippy little car.
He is requesting a copy of the report.
The therapy session made her feel better.