| instant(adjective, immediate, urgent) | |
| precocious | |
| prematurely | |
| present | |
| primal | |
| primeval | |
| primitive | |
| primordial | |
| promptly | |
| starting point | |
| virgin(adjective, termination) | |
| young | |
| initial | |
| living | |
| premature(adjective, earlier) | |
| punctually | |
| advance | |
| ahead | |
| ahead of time(expression, idiom) | |
| alive |
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| APA | Smart Define. (2016). late thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/late/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "late thesaurus" https://smartdefine.org/late/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, late thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/late/thesaurus/antonyms>. |
| MLA | Smart Define. "late thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/late/thesaurus/antonyms> |