1. The state or quality of having crust or being like crust; hardness 
2. The quality of being crusty or surly

Derived forms: crustinesses

• siderosis
• siderostat
• sidesaddle
• sideshow
• sideslip
• sidesman
• sidesplitter
• sidesplitting
• sidesplittingly
• sidestep
• sidestroke
• sideswipe
• sidetrack
• sidewalk
• sidewall
• sideward
• sidewards
• sideway
• sideways
• sidewinder
• sidewise
• siding
• sidle
• sidle up
• Sidney