also, metal is very important across the cosmere as well, which is interesting.
I actually might have something more in-depth. some of this is from coppermind, and definitions, but some of it is my interpretation:
"The name Adonalsium is derived from a Hebrew name for God, Adonai." -coppermind
the suffix -al, as defined by google as relating to; of the kind of. (not sure if this is actually important, but it seems like something that nobody else has noticed, though.)
and the suffix -ium, forming names of metallic elements. (according to google, it could also be denoting a region of the body, or denoting a biological structure.)
so, it seems like it means something that was like or relating to a god (which brings up interesting implications), perhaps a metal, which means it could mean something like "something like or relating to a god metal (strange that we already have god metals...)" or maybe something else, perhaps it means "a region of or a structure in or relating to the body of a god", which I think is a really interesting concept.
I might be wrong, though. I would like to see what other people have to say.