These are crypic clues to names of places in Cornwall. No numbers of letters I'm afraid.
1-Patron saint of dentists 2-Broken, Yankee teen 3-Home of the Slobs (Slobs is capitalised on the sheet so I'm thinking of Harry Enfield's characters) 4-Bad breath
Harry Enfield played Wayne Slob, and there is a place called Wainhouse Corner, so that may be it.
I suppose St Teath makes sense, but "Teath" rhymes with "death" and doesn't sound like "teeth", so if it is a Local Quiz for Local Folk they shoud know that.