cul-de-sac /kŭlˈdə-sak or kulˈ/

1. A street, etc closed at one end
2. A blind alley
3. A route that leads nowhere (figurative)

• costlier
• costliest
• costliness
• costlinesses
• costly
• costmaries
• costmary
• cost of living
• cost of living index
• cost plus
• cost-plus
• cost price
• cost push
• cost-push inflation
• costrel
• costrels
• costs
• cost someone dear
• cost someone dearly
• cost the earth
• costume
• costumed
• costume drama
• costume dramas
• costume jewellery