• countermins,
• countersings,
• countersines,
• counter sinls,
• couner sinks,
• counter sinks,
• xountersinks,
• vountersinks,
• fountersinks,
• dountersinks,
• ciuntersinks,
• ckuntersinks,
• cluntersinks,
• countersunks,
• counersinks,
• countesinks,
• countersynks,
• countersincs,
• countersics,
• countsinks

• countermeasure,
• counterwoman,
• counteraction,
• counterpoint,
• counterplea,
• counterblast,
• countercheck,
• counterman,
• controversial,
• counteroffer,
• countersuit,
• counterplay,
• countervail,
• counterbore,
• conterminous,
• counterglow,
• countersink,
• counterpart,
• counterbalance,
• counterpoise,
• counterclaim,
• counterperson,
• countertenor,
• counterpunch,
• counterspy,
• counterfeit,
• counterpane,
• counterpoison,
• counterfire,
• counterfoil,
• countersink bit,
• counterproposal,
• countercoup,
• counterplan,
• counterplot,
• counterpose,
• counterbalanced,
• countermarch,
• counterfeiter,
• Contreras,
• countertop,
• countersign,
• counterpoised,
• counterattack,
• countermand,
• counterstrike,
• counterblow,
• counterstain,
• countermine,
• counter tube,
• countermove,
• counter check,
• counteract,
• countershot,
• countervailing.

The adjective form of the word "countersinks" is "countersunk".