Home › Words › C › countersinkercountersinkercountersinker means A device that countersinks.EtymologyFrom countersink + -er.nounA device that countersinks.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.countersink 84% match — A conical recess, typically machined at the mouth of a hole to admit a screw (with a matching taper) so that the screw sits flush with a surface. vs countersinker →countersunk 73% match — That has a flat conical top allowing it to be inserted flush with a surface vs countersinker →counterboring 72% match — A counterbore. (cylindrical recess) vs countersinker →counterbore 67% match — A cylindrical recess, typically machined at the mouth of a hole to admit a screw (such as a cap screw) so that the screw sits flush with a surface. vs countersinker →centrebit 59% match — An instrument turning on a centre, for boring holes. vs countersinker →counterpuncture 56% match — Synonym of counteropening. vs countersinker →sinker 55% match — That which sinks or descends. vs countersinker →counterworker 54% match — One who works at a counter. vs countersinker →