The dictionaries I use do approve of "ginormous" (as a combination of gigantic and enormous). Mayhaps is also one of those words (maybe and perhaps). And there's also mayhap (may-happen), which is more commonly accepted in dictionaries than the previous.

I only knew "confuzzled" and "woot" (though usually spelt "w00t" by gamers) from the list.

I like snickery... though snirt sounds like green snot to me.