sesquicentenary/ˌseskwisenʹteenəri, -ʹtenəri/ noun (pl -ies) (pl sesquicentenaries)

• armour
• armoured
• armoured fighting vehicle
• armourer
• armour plate
• armoury
• armpit
• armrest
• arms
• arms race
• arm-twisting
• arm wrestling
• army
• army ant
• Army List
• army worm
• arnica
• A-road
• aroha
• aroid
• a roll in the hay/sack
• aroma
• aromatherapy
• aromatic
• aronia