No, the word 'is' is not a noun. The word 'is' is a verb, the third person, singular, present form for the verb 'to be'; often used as an auxiliary verb. Examples:
He is a scientist.
She is coming home.
It is my favorite.
common noun
Common
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Camel is a common noun.
Th word tail is a common noun because the first letter of a proper noun is capitalized.
common
it is re@lly @ common noun
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.