knag /nag/

1. A knot in wood
2. A peg

knaggˈiness noun

• gas fire
• gas-fired
• gas fires
• gas-fitter
• gas-fitters
• gas-fittings
• gas-furnace
• gas-furnaces
• gas gangrene
• gas gangrenes
• gas giant
• gas giants
• gas-globe
• gas-globes
• gas gun
• gas guns
• gas-guzzler
• gas-guzzlers
• gas-guzzling
• gash
• gas heater
• gas heaters
• gashed
• gas helmet
• gas helmets