There is a total of 1875 clues beginning with oc
- Octa- minus two
- Octa- plus one
- Octa- plus two
- Octad
- Octad in a gallon
- Octad plus one
- Octagon features
- Octagon inscription
- Octagon message
- Octagon octet
- Octagon or oval
- Octagon or oval eg
- Octagon or oval, eg
- Octagon or square, eg
- Octagon part
- Octagon word
- Octagon, eg
- Octagonal
- Octagonal order
- Octagonal road sign
- Octagonal road sign, in Arles
- Octagonal road sign
- Octagonal sign
- Octagonal sign color
- Octagonal sign color, often
- Octagonal sign word
- Octagonal sign
- Octagonal street sign
- Octagonal street sign
- Octagonal traffic sign
- Octagonal warning
- Octagonal warning sign
- Octagonal-sign command
- Octagonal-sign word
- Octagons, hexagons, etc
- Octahedrite, a mineral
- Octahedrite
- Octal system
- Octane booster
- Octane Booster brand
- Octane rating sites
- Octane, eg
- Octave
- Octave follower in a Petrarchan sonnet
- Octave followers
- Octave followers, in sonnets
- Octave of a feast
- Octave of the third, in music
- Octave twelfths
- Octave's counterpart in a sonnet
- Octave's follower in a Petrarchan sonnet
- Octave's follower, in some poetry
- Octave, eg
- Octave, for one
- Octaves
- Octaves above treble staffs
- Octaves' followers in sonnets
- Octaves
- Octavia and Claudius
- Octavia Butler genre
- Octavia Butler novel
- Octavia E Butler's genre
- Octavia's "others"
- Octavia's emperor-husband
- Octavia's garment
- Octavia's husband
- Octavia's husband Marc
- Octavia's offer?
- Octavia's sister
- Octavia's spouse
- Octavia's spouse
- Octavia, to Nero
- Octavian's foe
- Octavian's one
- Octavian's wife
- Octavian, for one
- Octavio Paz book
- Octavus Roy ___
- Octavus Roy ___, writer
- Octet
- Octet "a-milking" in a Christmas song
- Octet + sestet
- Octet count
- Octet followers, in Italian sonnets
- Octet for a squid
- Octet in "The 12 Days of Christmas"
- Octet in "The Twelve Days of Christmas"
- Octet in an oxygen atom
- Octet in many pizza boxes
- Octet in Monopoly
- Octet member with the shortest name
- Octet minus five
- Octet minus one
- Octet number
- Octet of black squares in the middle of this grid, typographically
- Octet of elite colleges
- Octet of elite schools
- Octet on the eighth day of Christmas
- Octet plus one
- Octet since 2006