Methodology :- black box , White box approach.
Big bang approach.
Practices :- how do u maintain reports.How testing is done.
Does your testing team and development team sit
together?Do you prepare test plan.
Or you follow Agile testing.
1. Defect sheet, its life cycle.
3. Do you use any tool for defect management.
Besides established standards, you could define words as you want. I would say that a "methodology" is a comprehensive approach to solve a problem and a "practice" is a specific activity / technique that you could use.