Except that "exasurbate" is a homonym of "exacerbate" so no one will discern the difference in the spoken word. Besides, the joke is lost if you just say the same word with a different spelling. I think maybe you're missing the joke.I still prefer 'exasurbate' better.
If I got it wrong I still like it better - especially now that it appears 'exasurbate' is my own coinage and definition.![]()