Here are examples of the word/phrase "adeptness" used in a sentence and paraphrased in a sentence...
If he would improve his overall adeptness, he would be less clumsy.
If he would ameliorate his overall skillfulness, he would be less clumsy.
Some times, adeptness is more important than strength.
Some times, skillfulness is more consequential than vigor.
Their adeptness is what won them the tournament.
Their skillfulness is what won them the tournament.
Other Examples...