In searching for "mirifical" I found a list of Peacock words, and have hijacked a few:

uncommon words in the works of Peacock

--------------------------------------------------------------------------------




WORD MEANING SOURCE

accinge (v.) gird C.C., xviii
adhibit (v.) apply, employ H.H., v


adoperation* (n.) application, use M.


agrestic (adj.) rural M.o.E., vi


antiperistatical (adj.) contrary to surroundings, antagonistic N.A., viii


antithalian* (adj.) non-comic N.A., iv


appetency (n.) desire, propensity M.o.E., xi


assation (n.) roasting H.H., xiii


atrabilarious (adj.) melancholy, ill-tempered N.A., i


autochthonous (adj.) home-grown, aboriginal M.o.E., vi


compotatory (adj.)* of drinking together G.G.,


conglobated (ppl.) gathered into a ball G.G.,


conterminal (adj.)* with a common border C.C., ix


contund (v.) pummel, pound, bruise C.C., viii


digladiation (n.) argument C.C., x


dyslogistic (adj.) ill-sounding, opprobrious C.C., viii


eleutherarch (n.) ruler of secret society N.A., ii


elixion (n.) boiling H.H., xiii

autochthonous (adj.) home-grown, aboriginal M.o.E., vi

I was in French Immersion for a few years in school, and I clearly remember that the Canadian French word for the people we call "First Nations" in English Canada and you call "Native Americans" in the US is autochtone. (Spelling may be wrong.)

Actually, autochthonous is not a rare word, but I used to see it infrequently enough that I had to keep looking it up.I'm surprised it was in the Peacock list.
autochthon
n.,
pl. 3thons or 3tho[nes# 730! ncz#8 5Gr autochthon, sprung from the land itself < autos, self + chthbn, earth: see HOMAGE6
1 any of the earliest known inhabitants of a place; aborigine
2 any indigenous animal or plant
au[toch4tho[nous 730! n!s8 or au[toch4tho[nal
adj.
au[toch4tho[nous[ly
adv.

Oh, i like conglobated -- the children played with conglobated snow, pelting the sides of passing busses!
conglobated snow-- the word nerd's way of saying snowballs!

Not to mention having the word Pavonian as an adjective for Thomas Peacock's style, vocabulary etc. A Pavonian website can be found at http://www.thomaslovepeacock.net/

Bingley