A random assortment of archaic/disused English words that should still be used:
brust (bristled or bristly)
coolth (coolness. We still have 'warmth' so why did this one disappear????)
ambiloquent (using ambiguous language)
downsteepy (steeply descending)
mazeful (confusing)
evulgate (to send out among the people, to publish or distribute)
toploftical (haughty)
hazardry (risk-taking)
dizzard (a fool, jester, or stupid person)
againster (someone who is habitually opposed to things or 'against' things)
loselry (behavior characteristic of a losel, which is similar to a 'loser,' except the connotation encompasses "profligate" or "scoundrel")
plaguey
malengine (evil intent, fraud, deceit)
beasten (of or pertaining to beasts)
wranglesome (contentious and prone to quarreling)
dwine (to waste away)