1. One who writes letters; an instrument for copying letters; a book to teach letter-writing.

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

• ketter writer,
• petter writer,
• oetter writer,
• lwtter writer,
• lstter writer,
• ldtter writer,
• lrtter writer,
• l4tter writer,
• l3tter writer,
• lerter writer,
• lefter writer,
• legter writer,
• leyter writer,
• le6ter writer,
• le5ter writer,
• letrer writer,
• letfer writer,
• letger writer,
• letyer writer,
• let6er writer

The adjective form of "letter writer" is " epistolic".

The plural form of "letter writer" is "letter writers"

The singular form of the word "letter writer" is "letter writer".