1) Detergence 2) Detergent quality 3) Usefulness 4) Utility 1) Detergence 
• (n.) A cleansing quality or power.
Detergency is the property of surfactants that allows them to clean things for us. The surfactants accumulate on the oil/water interface so that when we scrub the oily stain to break it up, the oil drops do not coaleasce. 
De·ter'gen·cy noun A cleansing quality or power. De Foe. 
[n] - detergent quality
detergency 1. Having cleansing power. 2. Having the properties of a detergent.
detergence noun detergent quality; the quality of having cleansing power