PICKET is validvalid

to stand outside of some location, as a business, to publicize one's grievances against it [v PICKETED, PICKETING, PICKETS]

25,463 of 196,601 in NWL2023·also valid in CSW24

a person or group stationed to watch and dissuade those who go to work during a strike [n -S] / to act as a picket, also PICQUET, PIQUET [v -ED, -ING, -S]