Knives is not a proper noun (a name for a person, place, organization, or branded item), it is a plural noun.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Yes, knives is a noun, a plural, common, concrete noun. A noun is a person place or thing and knives are a thing.
Yes, the noun knives is a common noun, the plural form of the singular knife; a word for any knife of any kind, a word for a thing.A proper noun is the name of a specific person, place, thing, or a title; for example:Bill Burke Knives, Boise, IDSix Knives Road, Raleigh, NCKnives of Alaska, Airport Drive, Denison, TX"The Night of the Knives", a novel by Jon Evans
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?