Ginormous vs. Egantic
(And yes, I, Don Sheffler, made up Siamenym. If you use the word anywhere you have to mention how awesome I was to come up with it, and of course you need to let M-W and OED know its source. The opening sentence in this post would be the word's first known usage - blog or otherwise. As far as I know. OK?)
Anyway Ginormous seems vaguely feminine. Big, to be sure, and feminine.
Egantic just seems powerfully manlike and huge. Ahh, nah, it doesn't. Who am I kidding? I was just trying to find a way to get Siamenym into the game.
I'm all flusterpated now.