different between rumminess vs yumminess

English

rummy +? -ness

rumminess (uncountable)

(Britain, colloquial, dated) The quality of being rummy, or odd.
- 1923, P. G. Wodehouse, The Inimitable Jeeves
  "Tut!" said old Bittlesham. "Tut is right," I agreed. Then the rumminess of the thing struck me. "But if you haven't dropped a parcel over the race," I said, "why are you looking so rattled?"

yummy +? -ness

yumminess (uncountable)

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