Counterboring is valid Scrabble Word

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

13 letters word
18 points in Scrabble
24 points in WWF

Definitions for COUNTERBORING in dictionary:

VERB:

COUNTERBORE, to form a counterbore in

NOUN:

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)

Words related to COUNTERBORING

counterbore15

Similar words containing UNTERBOR without suffix ing and without prefix co

counterbore15 counterbored17 counterbores16

Find what other words can be done using letters: "counterboring"
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