I am looking for the term that describes words that are defined as "of or pertaining/related to ______" or "the study of_____". Thank you [closed]

I suspect that there is no one word that refers to the broad range of "of or relating/pertaining to" words in usage. If it helps, there's a discussion of the suffix -ial, which is defined as:

Of, relating to, or characterized by

And, as mentioned by @Silenus, -ine suffixes are also defined as "of or relating/pertaining to".

There's a large, though not exhaustive, list of -ial words here.