obsequious a :excessively obedient or submissive
obfuscation n :darken/obscure; bewilder, confuse
obscurrantism n : opposition to spread of knowledge; deliberate vagueness
obtund t.v. : reduce the edge or violence; dull
obtuse a :not pointed; blunt, not acute sensibility
oeuvre n :work
oligarchy n :form of government w/power vested in few; the ruling few
oligopoly n :market controlled by few producers/sellers; stockholders
omertà : criminal code of silence
omnibus n :collection of writings w/same theme or author
onomatopoeia n :formation of words by imitation of sounds; ie, buzz/hum/boom
opporobrium n : disgrace/reproach for shameful/wrong conduct
ossify v.t. :to form/change into bone; inflexible in outlook
ostensibly adv :professed/apparent
outlier n :residence/business at a distance; classed differently
outre a :to carry to excess; violating convention/propriety; bizarre
oxymoron n :contradictory or incongruous words