nonsenseletters
nounUK /ˈnɒnsənsˌlɛtəz/
US /ˈnɑːnsɛnsˌlɛtərz/
Letters that are put together in a silly way and do not make real words.
The baby scribbled nonsenseletters all over the paper.
OTHER MEANINGS
2. Writing that looks like letters but has no meaning.
The note was full of nonsenseletters that nobody could read.
3. A playful made-up word for silly marks that look like writing.
He wrote nonsenseletters in the fog on the window.
4. Letters mixed up in a random order.
The puzzle showed nonsenseletters that you had to unscramble.