Is 'foyer' a common noun or a proper noun?

Answer 1

The word 'foyer' is a common noun, a word for any foyer of any kind, anywhere.

A proper noun is the name of a specific person, place, thing, or a title; for example:

• Christine Helen Foyer, Professor of Plant Sciences, University of Leeds, Leeds, UK
• Foyer Street, Edison, NJ or Foyer Avenue, Capitol Heights, MD
• Foyer Cafe, Sydney, NSW Australia or The Foyer Cafe, Portsmouth, UK
• "Rien Ne Vaut La Douceur Du Foyer", a novel by Mary Higgins Clark