1. A regular purchaser at a particular place of business; a fellow one has to deal with.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• custemor,
• custormer,
• customm,
• castumer,
• coustmer,
• cusotmer,
• cusutomer,
• custermer,
• coustome,
• customr,
• coustimer,
• custimor,
• cuastomer,
• coustomers,
• customeror,
• costomor,
• cusomter,
• customor,
• cuctomer,
• custiomer

• customary,
• customs,
• custom-make,
• customised,
• custom-made,
• custom,
• customize,
• customise,
• customarily,
• customized,
• customhouse.

The adjective form of the word "customer" is "customary".

The plural of the "customer" can be the "customers".

The singular of the "customer" can be the "customer".