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100 Best Synonyms for “Once”

October 9, 2026

100 Best Synonyms for

No. Item Definition
1. a lone time a single occasion
2. a single occasion only one occasion only
3. a single time one time only
4. ages ago a very long time ago
5. at a point at a certain time
6. at a prior point at a previous time
7. at a stage during a certain period
8. at a time during one period
9. at an earlier point at a previous time
10. at one earlier moment at one prior moment
11. at one earlier point at one prior time
12. at one earlier stage during one prior period
13. at one moment at a certain moment
14. at one point at a certain time
15. at one prior moment at one earlier moment
16. at one prior point at one earlier time
17. at one prior stage during one earlier period
18. at one stage during one period
19. at one time formerly or once
20. at some earlier point at some previous time
21. at some earlier stage during some previous period
22. at some point at an unspecified time
23. at some prior point at some previous time
24. at some prior stage during some previous period
25. at some stage during some period
26. at some time at an unspecified time
27. back then at that past time
28. before at an earlier time
29. earlier at a prior time
30. erstwhile former; in the past
31. formerly at an earlier time
32. in bygone days in earlier times
33. in days gone by in the past
34. in earlier days in former times
35. in earlier times formerly
36. in former times long ago
37. in olden days long ago
38. in previous times formerly
39. in prior times formerly
40. in the past formerly; before now
41. in time past formerly
42. in times past formerly
43. long ago far back in time
44. on a prior occasion once before
45. on an earlier occasion once before
46. on one earlier occasion once before
47. on one instance on one occasion
48. on one prior occasion once before
49. on that occasion at that time
50. on this occasion at this time
51. one bout one occurrence
52. one brief instant one very short instant
53. one brief moment one short moment
54. one brief spell one short period
55. one brief time for one short occasion
56. one crack one attempt
57. one day at some time
58. one earlier time on one prior occasion
59. one fleeting moment one very brief moment
60. one former occasion one past occasion
61. one former time one past occasion
62. one go one attempt
63. one instance a single occurrence
64. one instant one very short moment
65. one interval one period
66. one minute a short time
67. one moment a single moment
68. one occasion a single time
69. one pass one attempt
70. one past time one earlier occasion
71. one period one span of time
72. one previous time on one earlier occasion
73. one round one occurrence
74. one run one attempt
75. one second a very short time
76. one session one period of activity
77. one short spell one short period
78. one short time for one short period
79. one shot one attempt
80. one sitting one uninterrupted session
81. one solitary time just one occasion
82. one spell one period
83. one stab one attempt
84. one stint one period
85. one stretch one continuous period
86. one time on one occasion
87. one try one attempt
88. one turn one occasion
89. previously before now
90. single occasion one particular time
91. sometime at an unspecified past time
92. that time on that occasion
93. the one time that single occasion
94. then at that time
95. this time on this occasion
96. upon a time at one time
97. years ago in past years
98. years back many years ago
99. yonks ago a very long time ago
100. yore time long past

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