- contraoctave23
- contraoctaves24
- isooctane13
- isooctanes14
- noctambulist24
- noctambulists25
- octad9
- octadic14
- octads10
- octagon13
- octagonal16
- octagonally21
- octagons14
- octahedra15
- octahedral17
- octahedrally22
- octahedron17
- octahedrons18
- octal9
- octameter15
- octameters16
- octan9
- octane10
- octanes11
- octangle15
- octangles16
- octanol12
- octanols13
- octans10
- octant10
- octantal13
- octants11
- octapeptide21
- octapeptides22
- octarchies18
- octarchy18
- octaval15
- octave13
- octaves14
- octavo13
- octavos14
- subcontraoctave30
- subcontraoctaves31
- trisoctahedra19
- trisoctahedron21
- trisoctahedrons22