Synonym Chooser

How does the adjective simultaneous differ from other similar words?

Some common synonyms of simultaneous are coeval, coincident, contemporaneous, contemporary, and synchronous. While all these words mean "existing or occurring at the same time," simultaneous implies correspondence in a moment of time.

the two shots were simultaneous

When can coeval be used instead of simultaneous?

Although the words coeval and simultaneous have much in common, coeval refers usually to periods, ages, eras, eons.

two stars thought to be coeval

In what contexts can coincident take the place of simultaneous?

In some situations, the words coincident and simultaneous are roughly equivalent. However, coincident is applied to events and may be used in order to avoid implication of causal relationship.

the end of World War II was coincident with a great vintage year

When is it sensible to use contemporaneous instead of simultaneous?

The words contemporaneous and simultaneous are synonyms, but do differ in nuance. Specifically, contemporaneous is more often applied to events than to people.

contemporaneous accounts of the kidnapping

Where would contemporary be a reasonable alternative to simultaneous?

The meanings of contemporary and simultaneous largely overlap; however, contemporary is likely to apply to people and what relates to them.

Abraham Lincoln was contemporary with Charles Darwin

When might synchronous be a better fit than simultaneous?

The synonyms synchronous and simultaneous are sometimes interchangeable, but synchronous implies exact correspondence in time and especially in periodic intervals.

synchronous timepieces

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of simultaneous Other, more radical proposals for European unity instead called for full, political integration simultaneous to economic integration. TIME, 23 Feb. 2025 At a time when viewers can pick and choose content at a whim, sports remains one of the few formats extant that can draw the large simultaneous audiences that advertisers crave. Brian Steinberg, Variety, 20 Feb. 2025 McClung, who has played the majority of his career in the NBA G-League since leaving Texas Tech, replicated the move with his right hand, added a simultaneous dunk by slamming another ball with his left hand, and earned a perfect 50. Joseph Dycus, The Mercury News, 15 Feb. 2025 Of course these programs are experiencing simultaneous basketball revivals. Steven Louis Goldstein, The Athletic, 15 Feb. 2025 See All Example Sentences for simultaneous
Recent Examples of Synonyms for simultaneous
Adjective
  • Before the switch to Motorola and the concurrent addition of fire station alerting software, telecommunicators would have to put callers on hold to dispatch emergency responders.
    Shelley Jones, Chicago Tribune, 3 Mar. 2025
  • The concurrent meetings of the two bodies are known as the Two Sessions.
    TIME, TIME, 3 Mar. 2025
Adjective
  • Time is rendered as a synchronous blend of moments, untethering and distorting any normative perspective.
    Sakhi Thirani, JSTOR Daily, 22 Mar. 2023
  • Well, considering the space telescope will be pretty much mapping everything in the sky from its special dawn-dusk sun synchronous orbit that keeps it cool enough to study infrared emissions — the list is endless.
    Monisha Ravisetti, Space.com, 31 Jan. 2025
Adjective
  • With a lockable synchronic-tilt mechanism and special Z-Shape design, the Kaiser 2 can accommodate a weight up to 180kg, quite a bit more than normal mechanisms on office chairs and the back can be reclined to an angle of 160 degrees which can be locked when not in rocking mode.
    Mark Sparrow, Forbes, 11 Oct. 2021
  • For his last runway collection, unveiled in September, Michele constructed a parallel universe of side-by-side shows separated by a wall that when lifted revealed twins in identical looks in synchronic stride.
    Colleen Barry, Fortune, 24 Nov. 2022
Adjective
  • The timing of these changes were roughly coincident with clarification of Information Blocking rules and Epic’s introduction of its own competing product.
    Seth Joseph, Forbes, 26 Feb. 2024
  • Another suggestion is that there were two more or less coincident eruptions, one each in northern and southern hemispheres.
    Erik Klemetti, Discover Magazine, 26 July 2011

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Cite this Entry

“Simultaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/simultaneous. Accessed 13 Mar. 2025.

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