Often we may see adjectives with nouns that are implied, but not explicitly written. I see this mostly with sports team names and demonyms. For example:
The Notre Dame Fighting Irish
Is "Irish" a noun, or is it strictly an adjective where "people" is implied? In Latin, which has genders, you could write an adjective without a noun, and "man" or "woman" could be implied based on its gender (and generally, I've seen the masculine plural referring to people without gender importance). We can't do that in English as adjectives are not grammatically grouped into genders.
Here's another example:
"The Chinese are very hard-working."
Is "Chinese" officially a noun or is it merely an adjective?