kinda related.
compendium of lost and out of date words:
http://phrontistery.info/clw.html
some of my favorites...
brephophagist - one who eats babies
bajulate - to bear a heavy burden
crassulent - grossly obese
diffibulate - to unbutton or unbuckle
foppotee - simpleton
gnathonize - to flatter
historiaster - petty or contemptible historian
hiulcity - an opening or cleft
surgation - erection of the penis
that being said, i dont know what my favorite word is.