No, it is not. It is a noun, and may be used with adjuncts (game warden).
The warden
A warden could be a prison warden: a person in charge of a game reserve; a Youth Hostel Warden, and so on.
The 'w' on an ARP warden stands for Warden.
The address of the Warden Community Library is: 305 S Main, Warden, 98857 0813
The warden or governor, depending on which country you are in.
Hugh Warden's birth name is Hugh Alonzo Warden.
Warden Neil's birth name is Warden Neil Skudder.
The safari zone warden is in his house in the safari. he is the warden of zone 3.
the warden is known to be about the age of 25/30
The warden of the prison oversaw the daily operations and ensured the safety of the inmates.
Warden Justice
A traffic warden can be a man or a woman