DAMP is validvalid

moist [adj DAMPER, DAMPEST] : DAMPLY [adv], DAMPNESS [n] / to lessen in intensity [v DAMPED, DAMPING, DAMPS] : DAMPER [n]

1,944 of 196,601 in NWL2023·also valid in CSW24

to wet slightly [v -ED, -ING, -S] / moist [adj DAMPER, DAMPEST, DAMPLY]