S₁T₁R₁E₁N₁G₂T₁H₄E₁N₁E₁D₂

17 points

STRENGTHENED is validvalid

STRENGTHEN, [v STRENGTHENED, STRENGTHENING, STRENGTHENS] : STRENGTHENER [v]

175,398 of 196,601 in NWL2023·also valid in CSW24

STRENGTHEN, to make stronger [v]

236,267 of 280,887 in CSW24·also valid in NWL2023