What is the common noun in this sentence The lost necklace was found overcoat?

The common noun in the sentence "The lost necklace was found in the overcoat" is overcoat.

Here's why:

* Common nouns refer to general, non-specific people, places, or things.

* Proper nouns are specific names of people, places, or things (e.g., John, London, Eiffel Tower).

"Overcoat" is a general term for a type of clothing, while "necklace" is a specific item.