Similar words: on second thoughts, thought, a thought, forethought, thoughtful, second to none, thoughtless, aforethought. Meaning: n. thinking again about a choice previously made.
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1. As for the money, don't give it a second thought.
2. He dived in after her without a second thought.
3. She dismissed the rumour without a second thought.
4. I accepted the offer without a second thought.
5. He dismissed the rumour without a second thought.
6. I'll call her tomorrow - no, on second thought, I'll try now.
7. Noone, to my recollection, gave a second thought to the risks involved.
8. Roberto didn'tgive a second thought to borrowing $2,000 from him.
9. No self-respecting Zen-Buddhist spares a second thought for it.
10. On second thought, maybe he could just run for office.
11. On second thought, I am not going to Kunming.
12. On second thought, I decided to buy a tie.
13. Without a second thought, he joined in the work.
14. Hey , Ma , on second thought, can you wire us some extra scratch?
15. The second thought was fear, channelled into self-preservation: I jumped out of bed and grabbed my clothes from the floor.
16. On second thought, I see by doing this we might be in for another failure.
17. This murderous lunatic could kill them both without a second thought.sentencedict.com
18. The matter didn't seem important, and I hardly gave it a second thought.
19. She'll spend a hundred pounds on a dress without a second thought.
20. When I asked to borrow some money, she gave me £100 without a second thought.
21. A visitor to the control room of this nuclear missile submarine might pass it by without a second thought.
22. From the sound of it he'd blow you away without a second thought.
23. The notion that he might make any joke, except an obscene one, I dismissed without a second thought.
24. King Vessantara, being selfless, gave the elephant away without a second thought.
25. Not one of them, to my recollection, gave a second thought to the risks involved.
26. Think first before you express your opinion. Have a second thought before you make a decision. Dr T.P.Chia 
27. Personally, I'd put my money on accidental death without a second thought.
28. She had shot him without qualm of conscience, without a second thought, and walked away without even looking back.
29. Not only girls do care about the beauty of their skin, but everyone does also have a second thought of the issue of skin cancer nowaday .
30. Contrast Dobby's thoughtful, personalised gift with Harry and Ron's last - second thought.
More similar words: on second thoughts, thought, a thought, forethought, thoughtful, second to none, thoughtless, aforethought, thoughtfully, afterthought, unthoughtful, well thought out, thoughtlessly, food for thought, deep in thought, at the thought of, thoughtfulness, train of thought, through thick and thin, thought-provoking, freedom of thought, malice aforethought, thoughtlessness, thousandth, though, through and through, although, as though, even though, second.