This article is almost certainly exactly what it says it is : Shakespeare words you didn't know. Not words you didn't know Shakespeare invented, or cliches that came from Shakespeare that have changed over the years (I'm looking at you, glister/glisten).
Nope, this is words that you almost certainly never saw before. That is, unless you've played one of these parts or, you know, study this stuff for a living.
How about Gongarian? Or maybe crants, or tranect?
I'm sure I've skimmed over all of them (crants is apparently in Hamlet) and never really thought much about it. But I've certainly never heard of any of the ones listed. Your mileage may vary (hence, "almost exactly what it says", since I'm sure a number of you have in fact seen at least some of these words).