A proper noun is the name or title of a specific person, place, or thing. Some examples are:
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Palimony is a common noun
Xavier
Proper nouns begin with capital letters, not smell letters. Capital letters are used to distinguish a proper noun from a common noun, helping identify specific names of people, places, or things. Smell letters do not play a role in grammar rules regarding proper nouns.
A nine letter abstract noun that starts with U is ultimatum.
Samuel.
The proper noun is Jessica, the name of a person. A proper noun always starts with a capital letter.
David's
Nope. Common noun.
elephants
yes
The anagram is the proper noun Creoles.