noun
degree of certainty; certainty
Used to express how certain something is, often in technical or formal contexts.
この情報の確実度は高い。
The degree of certainty of this information is high.
確実度を評価する必要がある。
We need to evaluate the degree of certainty.
確率 means 'probability' and is more quantitative, while 確実度 refers to the level of confidence or certainty.
Compound of 確実 (certain, reliable) and 度 (degree).