C3O1C3K5S1H4U1T1S1
20 points
COCKSHUTS is validvalid
COCKSHUT, the close of day [n]
COCKSHUT, twilight, probably referring to a time when poultry are shut up for the night [n]
COCKSHUT, the close of day [n]
COCKSHUT, twilight, probably referring to a time when poultry are shut up for the night [n]