Arab
Part of speech: adjective
Definition: of or pertaining to Arabs and their nations
Part of speech: noun
Definition: A person of Arab origin. A breed of horse.
Arabian
Part of speech: adjective
Definition: Related to Arabia.
Part of speech: noun
Definition: A native of Arabia.An Arabian horse.
Example sentence: There are no military options for Iran. Attack them, and they will destroy the Gulf States oil industries, rain hundreds of missiles onto Israel, close the Arabian Gulf, and shoot oil prices to $300 per barrel, which could cause our own economic downfall.