suboctave /sub-okˈtiv/

1. The octave below
2. (also suboctave coupler) an organ coupler that gives an octave below

• all-seaters
• allseed
• allseeds
• all-seeing
• all-seer
• all-seers
• all serene
• all-singing, all-dancing
• all-singing-all-dancing
• all's one
• allsorts
• All Souls' Day
• allspice
• allspices
• all square
• all standing
• all-star
• all systems go
• all-telling
• all-terrain
• all that
• all the best
• all the fun of the fair
• all the go
• all the rage