Olympiad
Part of speech: noun
Definition: A period of four years, by which the ancient Greeks reckoned time, being the interval from one celebration of the Olympic games to another, beginning with the victory of Corbus in the foot race, which took place in the year 776 b.c.; as, the era of the olympiads.
Olympics
Part of speech: proper noun
Definition: The Olympic Games.
Example sentence: After one Olympics, if we invest in sports and say we will get a gold medal in the next Olympic, it doesn't work like that in sports. How it works is that you provide the infrastructure, provide education about nutrition and health.