These two words have always stumped me. I'd either forget what they meant or I'd forget how to pronounce them. I bet a psychiatrist would tell me that I'm "suppressing" those terms because they're REALLY SCARY and I'm fundamentally a coward. But Im not shelling out $250/hr to find out.
CHIMERA is pronounced "kye MEER uh" and it's defined as a frightening monster made up of bizarre combinations of different animals.
You'll see chimera frequently defined as a
This is a coconut macaroon:
MASCARON is properly pronounced "MASK kah rohn" and is a grotesque mask (facial) motif, like the one shown below on a 19th c. majolica urn: