1) Digit 2) Eight 3) Eighter 4) Eighter from decatur 5) Figure 6) Octad 7) Octet 8) Ogdoad 9) Poetic form 10) Viii 1) Eighter 2) Octad 3) Octet 4) Ogdoad 
An octonary is an eight-line section in a poem, song or psalm. The most notable example is found in Psalm 118 In the French renaissance the octonaire became a form of moralizing chanson. ...
of, like or pertaining to or consisting of eight things; grouped in eights
• (a.) Of or pertaining to the number eight.
Oc`to·na·ry adjective [ Latin octonarius , from octoni eight each, from octo eight.] Of or pertaining to the number eight. Dr. H. More.