| coincident(adjective, time, current, modern, up-to-date) | |
| concurrent(adjective, accompanying, synchronism) | |
| contemporaneous(adjective, current, modern, up-to-date, contemporary) | |
| contemporary(adjective, time, current, modern, up-to-date) | |
| synchronous(adjective, current, modern, up-to-date, contemporary) | |
| coeval(adjective, current, modern, up-to-date, concurrent) | |
| concomitant(adjective, current, modern, up-to-date, contemporary) | |
| coinciding | |
| coincidental | |
| coexisting(adjective, current, modern, up-to-date, concurrent) | |
| coetaneous(adjective, contemporary, synchronism) | |
| synchronal(adjective, current, modern, similar, up-to-date) | |
| synchronic(adjective, synchronism) | |
| coexistent(adjective, contemporary) | |
| collateral | |
| cooccurring | |
| accompanying | |
| attendant | |
| parallel(adjective, synchronized) | |
| concurring(adjective, contemporary, like-minded, congruent, confirmative) |
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| APA | Smart Define. (2016). simultaneous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/simultaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "simultaneous thesaurus" https://smartdefine.org/simultaneous/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, simultaneous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/simultaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "simultaneous thesaurus" 10 March 2016. Web. 20 September 2026. <https://smartdefine.org/simultaneous/thesaurus/synonyms> |