Countersink vs Countersing - What's the difference?

As verbs the difference between countersink and countersing

is that countersink is to create such a conical recess while countersing is (biology|of a bird) to sing in response to the song of another.

is a conical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.

(en noun)

a conical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.

To create such a conical recess.

to countersink a hole for a screw

To cause to sink even with or below the surface.

to countersink a screw or bolt into woodwork

(biology, of a bird) To sing in response to the song of another