NU tone (telecommunications)

Number unobtainable tone

• armour-plates
• armour-plating
• armours
• armoury
• armozeen
• armozeens
• armozine
• armozines
• armpit
• armpits
• armrest
• armrests
• arms
• arms control
• arms controls
• arms-length
• arms race
• arms races
• arm's reach
• armure
• armures
• arm wrestling
• army
• army ant
• army ants