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 When those areas experience simultaneous drought and heat, the impacts can ripple. Hayleigh Evans, AZCentral.com, 13 Oct. 2025 This structural compatibility facilitates simultaneous quantum operations and permits smooth integration with current optical systems. Jijo Malayil, Interesting Engineering, 12 Oct. 2025 The Dragons even have two cold plunges valued at $50,000, and another weight room is being added to the indoor facility to allow for simultaneous workouts across programs. Charles Baggarly october 9, Fort Worth Star-Telegram, 9 Oct. 2025 Fast-charging state rates are from Paren, for stations with a minimum of four ports that provide at least 100 kW or more of simultaneous charging power. Francesca Paris, New York Times, 8 Oct. 2025 See All Example Sentences for simultaneous
Recent Examples of Synonyms for simultaneous
Adjective
  • Mistakes, complaints and promotions The secretary issued several policy memos concurrent with his address aimed at overhauling the inspector general and equal opportunity complaint processes as part of his push to produce more Pattons.
    Davis Winkie, USA Today, 14 Oct. 2025
  • The concurrent carriage deadlines for NBCUniversal and TelevisaUnivision are coincidence.
    Tony Maglio, HollywoodReporter, 2 Oct. 2025
Adjective
  • Williams also praised the chair for its slim profile, synchronous tilt, and adjustable lumbar support that make the seat suitable for long working hours.
    Audrey Lee, Architectural Digest, 25 Sep. 2025
  • Shift from synchronous to asynchronous communication.
    Jodie Cook, Forbes.com, 11 Sep. 2025
Adjective
  • 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
  • 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
Adjective
  • Regional banks bounced a bit, still down a couple percent on the week, as Thursday’s flush lower amid a few separate but coincident credit hiccups exacerbated underlying unease with the opaque and possibly lax lending across private credit and among smaller commercial banks.
    Michael Santoli, CNBC, 17 Oct. 2025
  • The coincident new Moon contributes no light pollution, making 2025 ideal for Orionid viewing.
    Big Think, Big Think, 13 Oct. 2025

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Cite this Entry

“Simultaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/simultaneous. Accessed 29 Oct. 2025.

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