F₄A₁T₁H₄O₁M₃L₁E₁S₁S₁

18 points

FATHOMLESS is validvalid

immeasurable [adj] : FATHOMLESSLY [adv], FATHOMLESSNESS [n]

128,064 of 196,601 in NWL2023·also valid in CSW24

incapable of being fathomed [adj FATHOMLESSLY]

86,349 of 280,887 in CSW24·also valid in NWL2023