noun
applicability
Refers to whether a rule, method, or principle can be applied to a particular case. Often used in technical, legal, or academic contexts.
この規則の適用性について検討する必要がある。
We need to examine the applicability of this rule.
新しい治療法の適用性を臨床試験で確認する。
The applicability of the new treatment is confirmed through clinical trials.
応用 means practical application or putting theory to use, whereas 適用性 focuses on the suitability or relevance of an application.
Compound of 適用 (てきよう, 'application') and 性 (せい, '-ity, -ness'), forming a noun meaning 'applicability'.