The word challenged is not a noun. The word 'challenged' is the past participle, past tense of the verb to challenge. The past participle of the verb is also an adjective.
The word challenge is the noun form.
Example: Are you up to the challenge?
The noun forms of the verb to challenge are challenger and the gerund, challenging.
common
its a noun not a proper noun think kid >:(
proper nouns are: him, her, they...
Rust is a common noun.
Big rock is a common noun. Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things. If a common noun is part of a name, it becomes a proper noun. Pronouns always replace proper and common nouns.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
Pencil proper or common noun
it's a common noun. a proper noun would be Spider-Man.
Proper noun or common noun
The noun cassette is a common noun.
a common noun?
The answer is proper noun. Examples of common noun and proper noun are: Proper noun: Mary Collins Common noun: monkey
Camel is a common noun.