I think it's pretty common, you're just not reaching for the right set of "-ence" words. Residence -> residential, Evidence -> evidential... Jurisprudential,

I think it's pretty common, you're just not reaching for the right set of "-ence" words. Residence -> residential, Evidence -> evidential... Jurisprudential, existential, penitential... The only thing is that about half have become "having characteristics related to the thing" instead of "about the thing". Words like consequential, pestilential, preferential have a common usage in this realm but still can be used in the "discussion about a thing" sense.