Similar words: alertness, smartness, shortness, explicitness, unexpectedness, expert, expertly, expertise. Meaning: ['ekspɜrtnɪs /'ekspɜːt-] 
n. skillfulness by virtue of possessing special knowledge.
n. skillfulness by virtue of possessing special knowledge. 
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1) The expertness of her driving surprised him.
2) He wanted his personal belief and his professional expertness to come out as a single attribute.
3) "Strength from Expertness, quality achieving excellence".
4) Does bow expertness requires Maxed Bow mastery?
5) Another sure way to recognize that you have covered all bases is your own sense of expertness.
6) Arbitration is a dispute resolution method for modern commercial dealings with characteristics of convenience, expertness and quickness.
More similar words: alertness, smartness, shortness, explicitness, unexpectedness, expert, expertly, expertise, earnestness, witness, fitness, hotness, fastness, deftness, vastness, neatness, softness, devoutness, sweetness, tightness, swiftness, quietness, exactness, lightness, ineptness, adeptness, greatness, intactness, adroitness, promptness.