areca nut (also betel-nut)

seed of this tree 槟榔果.

archipelago, architect, architectural, architecture, archive, archives, archivist, archway, Arctic, Arctic Circle, ardent, ardently, ardor, ardour (US ardor), arduous, arduously, are, area, area code (US) dialling code, areca, aren't, arena, arete, argon, argot, arguable, arguably, argue, argument, argumentation, argumentative, argumentatively, argy-bargy, aria, arid, aridity, aridly, aridness, Aries, aright,