No, the noun "firefighter" is a common noun; a general word for a person whose job is to extinguish fires; a word for any firefighter.
A proper noun is the name or title of a specific person, place or thing; for example, the Fallen Fire Fighter Memorial Monument in Colorado Springs, CO or the Museum of Firefighting in Hudson, NY.
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.
Firemen is a common noun. A proper noun would be the name of a specific fireman, like if you knew a fireman named Dan.
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.
The generic or common gender noun is fire fighter.
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
Yes, "firemen" should be capitalized when referring to members of the fire department in a specific context or as a proper noun (e.g., "The Firemen's Union").
The noun cassette is a common noun.
a common noun?
Camel is a common noun.