Antonym: pessimism. Similar words: optimistic, optimum, animism, option, adoption, optician, optic nerve, timid. Meaning: ['ɑptɪmɪzm /'ɒp-] 
n. 1. the optimistic feeling that all is going to turn out well 2. a general disposition to expect the best in all things.
n. 1. the optimistic feeling that all is going to turn out well 2. a general disposition to expect the best in all things. 
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1. Recent results must give some cause for optimism.
2. They ended the discussion on a note of optimism.
3. Her optimism turned out to be misplaced.
4. His optimism blinded him to many problems.
5. I'm full of optimism for the future.
6. I had to smile at his optimism.
7. The air-pollution board has reacted with cautious optimism to the announcement.
8. They expressed cautious optimism about a solution to the crisis.
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9. There was a note of optimism in his voice as he spoke about the company's future.
10. He was still full of optimism for the future despite his many problems.
11. to catch waves of optimism, there's hope you may die young at 80.
12. Her optimism seemed to infect all those around her.
13. There are very real grounds for optimism.
14. He swings from wild optimism to total despair.
15. By 1960, the initial optimism had evaporated.
16. He is a man of apparently boundless optimism.
17. I would caution against undue optimism.
18. There are grounds for cautious optimism .
19. We must confront the future with optimism.
20. Despite the crisis a cautious optimism prevailed.
21. I find it hard to share his optimism.
22. Both parties expressed optimism about an eventual solution.
23. There are now very real grounds for optimism.
24. It now seems their optimism was premature.
25. She's been sapped of her optimism.
26. Optimism was gradually taking the place of pessimism.
27. There was a note of optimism in his voice.
28. With close friends in their lives,people develop courage and positive attitudes.Teenagers have the moral support to assert their individuality;the elderly approach their advanced years with optimism and an interest in life. 
29. At the outset of her career she was full of optimism but not now.
30. The pulling down of the Berlin Wall infused the world with optimism.
More similar words: optimistic, optimum, animism, option, adoption, optician, optic nerve, timid, timing, timidly, intimidate, pessimistic, dismiss, skepticism, intimidation, intimidating, dismissal, euphemism, dismissed, misconception, from time to time, opt, adopt, opt for, adopted, helicopter, mimi, limit, mimic, simile.