No the word torpedo is a singular noun.
The plural noun is torpedoes.
Torpedoes is a common noun.
"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
it's a common noun. a proper noun would be Spider-Man.
Pencil proper or common noun
Proper noun or common noun
The word torpedoes is a common plural noun. It does not need an apostrophe.The torpedoes had been loaded.If torpedoes 'owns' something in the sentence, it needs an apostrophe.The tornadoes' paths continued straight.
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