ad infinitum
succinctly, concisely, tersely, briefly
bona fide
false, fake, bogus, spurious, counterfeit
buoyant
downcast, depressed, gloomy, morose
concede
contest, dispute, gainsay, challenge
congenial
disagreeable, surly, cold, standoffish
lofty
base, petty, low, sordid, despicable
perceive
miss, overlook, be blind to
prelude
epilogue, postlude, aftermath
rancid
wholesome, fresh
rustic
citified, urban, sophisticated, suave
sever
join, unite, weld together
sordid
pure, noble, opulent, lavish
untenable
irrefutable, impregnable, incontestable
versatile
limited, specialized, restricted
vindicate
implicate, incriminate, condemn, convict
wane
grow, wax, amplify, balloon, increase