knag /nag/

1. A knot in wood
2. A peg

• plum curculio
• plumdamas
• psychotic
• psychoticism
• psychoticisms
• psychotics
• psychotomimetic
• psychotoxic
• psychotropic
• psychotropics
• psychrometer
• psychrometers
• psychrometric
• psychrometrical
• psychrometries
• psychrometry
• psychrophilic
• psychs
• psych-up
• psych-ups
• psylla
• psyllas
• psyllid
• Psyllidae
• psyllids