So, at first I found some inconsistencies between online dictionaries, with some like Merriam-Webster saying "many" is an adjective, while Wiktionary saying its a determiner. Eventually I had stumbled on to this english.stackexchange question, though I felt like the answer was somewhat vague and inconclusive.
I also realized, when followed by an adjective, there was no comma. For example: "the many brown rabbits" instead of "the many, brown rabbits." This made me lean more towards the determiner side of things, but I did some more digging.
Eventually, I decided to try similar words such as "few" and "numerous". Like the "many" search, Merriam-Webster said it was an adjective while Wiktionary said it was a determiner. This time, Wiktionary did provide me with more information to its interpretation though. The first definition under "determiner" began was "(preceded by another determiner) An indefinite, but usually small, number of." I thought I had found the answer but then I realized, Wiktionary considered "numerous" an adjective, but it had the same comma thing as "many" and "few".
I googled it and the results I got suggested "the numerous brown rabbits" is used in place of "the numerous, brown rabbits."
I'm very confused now, and I would really like to put my mind at ease.
First off, I regard Wiktionary and Wikipedia as good references for information. While, the potential for alteration discredits them as a citation, the information itself on non-controversial matters (i.e. not religious or political subjects), is cited to actually credible sources and typically high quality.
Second, this question is not a duplicate of the one I mentioned. That question was asking if "the many" was grammatically correct. The consensus is yes, it is correct to say that. My question is what are these words?