63 entries under idiom topic. ×
| only one time(expression, adjective, adverb, past) | |
| used to be(expression, adverb, earlier, then) | |
| water under the bridge(expression, adverb, earlier, then) | |
| way back when(expression, adjective, late, old) | |
| all at once | |
| anno regni(expression, time) | |
| anno urbis conditae(expression, time) | |
| at a time | |
| children's story opener | |
| ere now(expression, the past) | |
| ex post facto(expression, the past) | |
| fairy tale start | |
| from prehistoric times(expression, the past) | |
| from time immemorial(expression, the past) | |
| in case | |
| in earlier times | |
| in former days | |
| in old days(expression, hitherto, sometime, erewhile) | |
| in olden times | |
| some other time |
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| APA | Smart Define. (2016). once thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/once/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "once thesaurus" https://smartdefine.org/once/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, once thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/once/thesaurus/synonyms>. |
| MLA | Smart Define. "once thesaurus" 30 March 2016. Web. 26 September 2026. <https://smartdefine.org/once/thesaurus/synonyms> |