O₁B₃S₁E₁R₁V₄A₁T₁I₁O₁N₁A₁L₁

18 points

OBSERVATIONAL is validvalid

pertaining to observation [adj] : OBSERVATIONALLY [adv]

182,847 of 196,601 in NWL2023·also valid in CSW24

related to observation [adj OBSERVATIONALLY]

162,038 of 280,887 in CSW24·also valid in NWL2023