1. The plural of effectiveness; the quality or degree of being effective; the ability to produce a desired or intended result.
Usage: Countable plural form used when referring to multiple instances, types, or measures of effectiveness.

Examples

• The study compared the effectivenesses of different teaching methods in the classroom.
• We need to evaluate the effectivenesses of our marketing campaigns across various regions.
• The effectivenesses of these medications vary depending on individual patient factors.
• Researchers measured the effectivenesses of several climate change policies.
• The report analyzed the effectivenesses of different conflict resolution strategies.
• Companies often benchmark the effectivenesses of their competitors' strategies.