Intumesce (verb) (rare)
Late 18th century: from Latin intumescere, from in- ‘into’ + tumescere ‘begin to swell’ (from tumere ‘swell’).
“He just went on and on, insistent to intumesce my rage!”
Nothingburger (noun) (Chiefly US)
A person or thing of no importance, value, or substance. Now esp.: something which, contrary to expectations, turns out to be insignificant or unremarkable.
1950s: from nothing and burger. Added to the OED October 2018.