pettifogger (n.)

• cardsharp
• cardsharper
• carper
• carpetbagger
• caviler
• censor
• crimp
• critic
• equivocator
• faultfinder
• hairsplitter
• hedger
• momus
• mystifier
• nitpicker
• obscurantist
• pitchman
• prevaricator
• quibbler
• scold
• shark
• sharp
• sharper
• sharpie
• shuffler
• shyster
• slicker
• tergiversator