Counterbore is valid Scrabble Word

Is counterbore a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is counterbore valid Words with Friends?
Words with Friends YES

11 letters word
15 points in Scrabble
19 points in WWF

Definitions for COUNTERBORE in dictionary:

VERB:

to form a counterbore in
To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

NOUN:

a straight-sided widening of the end of a bored hole
a drill whose bit has a uniform smaller diameter near the tip, for drilling counterbores in one operation.
a drilled hole that has a wider section at the top.
drill a counterbore in (an object)
A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
A kind of pin drill with the cutting edge or edges normal to the axis; -- used for enlarging a hole, or for forming a flat-bottomed recess at its mouth.
a bit for enlarging the upper part of a hole

Words related to COUNTERBORE

counterbored17 counterbores16 counterboring18

Words that contain COUNTERBORE

counterbored17 counterbores16

How to use COUNTERBORE in a sentence

When the cannon is loaded, a small quantity of powder is placed in the counterbore, and the spark between C and E ignites this and discharges the cannon.

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