GRE WORDS

obsequious = fawning, servile, overly submissive
obsequy = funeral ceremony
obstinate = stubborn
obstreperous = noisy, unruly, troublesome
obtuse = stupid, dull
occlude = block, to shut
odious = despicable, hateful
onerous = burdensome
opprobrious = abusive, disgraceful
ordain = appoint
ossify = harden
ostensible = apparent, seeming
ostentatious = pretentious, showy
overweening = arrogant, forward