No, the word 'somebody' is NOT a noun. The word 'someone' is an indefinite pronoun, a word that takes the place of a noun for an unknown or unnamed person.
Proper nouns are names, so unless you know somebody or somewhere named Hoof, then it's a common noun.
As a name of a road , Park Avenue', it is a proper noun, and both words star with a capital letter. However, when used separately, as 'the park, or 'the avenue', they are common nouns and so not need a capital letter.
It is a proper noun, because it is the name of a specific thing.
Proper noun
proper
it's a common noun. a proper noun would be Spider-Man.
Pencil proper or common noun
The noun cassette is a common noun.
a common noun?
Camel is a common noun.
The answer is proper noun. Examples of common noun and proper noun are: Proper noun: Mary Collins Common noun: monkey
A common noun.