Which of the words is a proper noun for park?

Is the noun common or proper?

"baseball"

What is the common noun for Adam?

Is the noun common or proper?

"teammate"

Is the noun common or proper?

"Monday"

Is the noun common or proper?

"Seattle"

Is the noun common or proper?

"bookshelf"

Is the underlined noun common or proper?

"My neighbor is moving to Texas."

Is the underlined noun common or proper?

"We traveled down the Mississippi River."

Is the underlined noun common or proper?

"I saw a lion at the zoo."

Is the underlined noun common or proper?

"Cars and boats require gas to run."

Is the underlined noun common or proper?

"Jennifer was sick all week."