Of course nouns have been made verbs in English. You'll find no British English dictionary listing where buffalo is, unless noting US usage, where it is both.

Of course nouns have been made verbs in English. You'll find no British English dictionary listing where buffalo is, unless noting US usage, where it is both. Police police police police is grammatically correct, but of little meaning : (the) police police(v) police (of) police (ie overseers of the police).