• locsts,
• cosets,
• conists,
• coastst,
• coursts,
• coauses,
• coarses,
• consits,
• casms,
• cousty,
• costes,
• coaces,
• custs,
• costst,
• casus,
• goasts,
• cossts,
• consets,
• casta,
• coastel

• toasts,
• costiasis,
• roasts,
• Costas,
• coast,
• coats,
• costs,
• boasts,
• coastwise,
• jousts,
• casts.

The adjective form of the word "coasts" is "coastal".