Similar words: caste system, faster, fasten, testes, unfasten, fastener, steadfast, contested. Meaning: [fæst /fɑːst] 
adv. most quickly.
adv. most quickly. 
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1. He that runs fastest gets the ring. 
2. Speech is the fastest method of communication between people.
3. Thinking of you still makes my heart beat fastest!
4. We ran a race and I was the fastest.
5. They are racing to see who is fastest.
6. The ostrich is the fastest animal on two legs.
7. He wanted to be the fastest man on earth.
8. The subway is the fastest way to get downtown.
9. The fastest runner clocked in at minutes 40 seconds.
10. This is one of the fastest Internet search engines.
11. Oddly enough, the most expensive tickets sold fastest.
12. He's one of the fastest runners in the world.
13. It is Britain's fastest growing national daily newspaper.
14. Ostrich is the fastest animal on two legs.
14. Wish you can benefit from our online sentence dictionary and make progress every day!
15. She is riding the fastest horse and is certain to romp home.
16. She clocked up one of the fastest times of the year.
17. He recorded the fastest lap in last weekend's Hungarian Grand Prix.
18. The fastest runner often runs the anchor leg of a relay.
19. Kenya's Robert Kibe was the fastest qualifier for the 800 metres final.
20. Welsh international Matthew Postle was third fastest at the halfway point.
21. The speed limit is the fastest speed you are allowed to drive a car at.
22. Elliott clocked the fastest time this year for the 800 metres.
23. The fastest runner set the pace and the others followed.
24. There's a prize for the fastest three runners in each category.
25. The cheetah is generally credited as the world's fastest animal.
26. The defending world racing champion recorded the fastest time in a final practice today.
27. Tevis usually finishes the fastest.
28. Voice over Car crime is the fastest growing crime.
29. The children had a competition to see who could hop the fastest.
30. He was awarded the gold medal for being the fastest runner.
More similar words: caste system, faster, fasten, testes, unfasten, fastener, steadfast, contested, priestess, testosterone, plaster cast, fast, fasting, fast food, breakfast, test, hard and fast, fastidious, hard-and-fast, testy, latest, attest, detest, fastidiously, testify, contest, testing, pretest, protest, last rites.