There is a total of 85689 clues beginning with o
- One of Bob Hope's sponsors
- One of Bolivia's capitals
- One of Bolivia's capitals
- One of Bolivia's official languages
- One of Borg's rivals
- One of Borge's specialities
- One of Boss Hogg's employees
- One of boxing's Spinks brothers
- One of Brazil's largest states
- One of breed of stunted cattle
- One of Bret Harte's roles
- One of Britain's great PM's
- One of British rock's "holy trinity"
- One of Broadway's Shuberts
- One of Brooklyn's Boys of Summer
- One of Buddha's 10 disciples
- One of Buddhism's three fires
- One of Buddhism's Three Jewels
- One of Buddy Holly's last hits
- One of Bugs' buddies
- One of Bugs's antagonizers, familiarly
- One of Burt's exes
- One of Bush 41's attorneys general
- One of Bush's sons
- One of Byron's names
- One of Byron's names
- One of C Moore's flying quadrupeds
- One of CS Lewis's four loves
- One of CTV's American competitors
- One of cable's oldest networks
- One of Caesar's "wives"
- One of Caesar's assassins
- One of Caesar's attackers
- One of Caesar's conquests
- One of Caesar's names
- One of Caesar's names
- One of Caesar's three famous words
- One of Caesar's trio
- One of Caesar's trio
- One of Cain's brothers
- One of Cain's sons
- One of Cairo's rivers
- One of Cairo's rivers
- One of Cajun cooking's "holy trinity"
- One of California's five
- One of California's Santas
- One of Calliope's sisters
- One of Calliope's sisters
- One of Calvin's alter egos (abbr)
- One of Can's Maritime provinces
- One of Canada's First Nations
- One of Canada's national railways (abbr)
- One of Canada's official languages (abbr)
- One of Canada's Prairie Provinces
- One of Canada's two main polit parties
- One of Canada’s First Nations
- One of Capone's arresters
- One of Captain Ahab's legs
- One of Captain Hook's band
- One of Captain Hook's men
- One of Captain Kirk's officers
- One of Carmen's people
- One of Carrie Bradshaw's main love interests in "Sex and the City"
- One of Carroll's 'slithy' creatures
- One of Carroll's slithy ones
- One of Carter's charges, on TV
- One of Carter's sons
- One of Carter's titles: Abbr
- One of Cary's exes
- One of Casey's men
- One of Central Park's 840
- One of certain Bulldogs
- One of Chaney's thousand
- One of Chaplin's wives
- One of Charles's brothers
- One of Charlie's Angels
- One of Charlie's companions
- One of Charlie's crimefighters
- One of Charlie's original angels
- One of Charlie's trio
- One of Charlie's wives
- One of Charlie's women
- One of Chaucer's Canterbury pilgrims
- One of Chaucer's pilgrims
- One of Chaucer's travelers
- One of Chekhov's "Sisters"
- One of Chekhov's "The Three Sisters"
- One of Chekhov's "Three Sisters"
- One of Chekhov's 'Three Sisters'
- One of Chekhov's Three Sisters
- One of Chekov's "Three Sisters"
- One of chemically related compounds
- One of chief deities of Hinduism
- One of China's capitals
- One of China's Northern Dynasties
- One of Chopin's 26
- One of Chopin's 27
- One of Chopin's Opus 10
- One of Chopin's Opus 25
- One of Christianity's deadly sins