Synonym: reckless, sloppy, slovenly. Antonym: careful. Similar words: nonetheless, homeless, senseless, nevertheless, tactlessness, less, release, telescope. Meaning: ['keəlɪs] 
adj. 1. marked by lack of attention or consideration or forethought or thoroughness; not careful 2. effortless and unstudied 3. (usually followed by `of') without due thought or consideration.
adj. 1. marked by lack of attention or consideration or forethought or thoroughness; not careful 2. effortless and unstudied 3. (usually followed by `of') without due thought or consideration. 
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31. She's careless about her spelling.
32. The boss walked into Peter for being so careless.
33. The student was careless about his personal appearance.
34. Careless driving cost him his life.
35. The accident happened chiefly because you were careless.
36. She had been inexcusably careless.
37. Careless campers were blamed for starting the forest fires.
38. He is careless in speech.
39. He seemed careless of his own safety.
40. He walked on,(Sentencedict.com ) quite careless of the elements.
41. This is careless work. Do it again!
42. Careless talk can be disastrous for a business.
43. His careless spending led him into debt.
44. She made some pointed references to his careless work.
45. The boss demoted the careless waiter to busboy.
46. He's very careless with money.
47. She gave a careless shrug.
48. He is careless about his personal appearance.
49. He cursed himself for having been so careless.
50. Some mothers were a bit careless with money.
51. He is severely put down for his careless work.
52. I got arrested for careless driving.
53. He signed cheques with careless abandon.
54. The teacher ticked him off for being careless.
55. chasten a careless writing style.
56. He's very careless with his money.
57. Nothing can justify such careless mistakes.
58. She's not so much poor as careless with money.
59. The text was corrupted by careless copyists.
60. Tom is careless in preparing his lesson.
More similar words: nonetheless, homeless, senseless, nevertheless, tactlessness, less, release, telescope, bless, relevant, unless, irrelevant, endless, much less, flawless, reckless, tactless, pointless, unrelentingly, tactlessly, no less than, regardless, more or less, irregardless, regardless of, sales, care, car, rely, flesh out.