khách hàng

Serves as the standard term for business clients or retail customers across both corporate and everyday commercial settings.

Contrast with khách alone (a general guest or visitor), thân chủ (a legal or professional client represented by a lawyer/consultant), or bệnh nhân (a medical patient).

Classifies naturally with người for individual clients or vị for a respectful tone toward a guest/customer, forming key collocations like chăm sóc khách hàng (customer service/care) and khách hàng tiềm năng (potential client).