1. ............ is an increase or improvement in quality, value, or extent.

Enhancement

Environment

Enhancament

Enhancemant

2. ............ is a synonym of enhancement.

Enrich

Worsen

Damage

Harm

3. ............ isn't a synonym of enhancement.

Enrich

Damage

Meliorate

Perfect

4. Cracks developed in the coating are usually not visible without ............

enhance

enhancement

enhancament

enhancer

5. It involves the same parameter as that involved in the ............ factor for coagulation of two equally charged particles .

enhancement

enhance

enhancar

enhancemant