Is “Letup” a Scrabble word?
Yes
LETUP
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Letup
noun
1.A pause or period of slackening.
“We waited for a letup in the rain, then we ran home before it started again.”