Yes, the word American is a proper noun, a word for a person from the country of America.
The word American is also a proper adjective, a word to describe something as of or from the country of America.
"American" is most often an adjective, but can also be used as a noun, meaning resident and/or citizen of America.
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
It's an adverb.
"Practice" is a verb in British English and an noun in American English.
freedom of speech and press
"American" is most often an adjective, but can also be used as a noun, meaning resident and/or citizen of America.
American Speech was created in 1925.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.