contemporary is likely to apply to people and what relates to them.
Abraham Lincoln was contemporary with Charles Darwin
contemporaneous is more often applied to events than to people.
contemporaneous accounts of the kidnapping
coeval refers usually to periods, ages, eras, eons.
two stars thought to be coeval
synchronous implies exact correspondence in time and especially in periodic intervals.
synchronous timepieces
simultaneous implies correspondence in a moment of time.
the two shots were simultaneous
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
Example Sentences
the hard economic times and the coincident increase in crime were a double strain on the city's social services a study to determine whether the areas with the highest family incomes were coincident with the locations boasting the highest percentage of college graduates
Recent Examples on the WebThese two events are coincident with a decrease in the production and activity of stem cells. Gabriel A. Silva, Forbes, 1 Feb. 2022 The tendency of policymakers to date has been to view the harms from internet platforms not as systemic, but as a series of coincident issues. Roger Mcnamee, Wired, 24 July 2021 Several of our hottest summers in the past decade have been coincident with developing La Niñas. Matt Rogers, Washington Post, 1 Sep. 2020 Also, just because Guillain-Barre Syndrome occurs in a patient diagnosed with COVID-19, that does not imply that it was caused by the virus; this still may be a coincident occurrence. Aarti Sarwal, The Conversation, 7 July 2020 The arrival of the pandemic was also coincident with flu season and the onset of seasonal allergies, which can produce an overlapping set of symptoms. John Timmer, Ars Technica, 28 Apr. 2020 Study co-author James Screen, a researcher at the University of Exeter, says the study relies on three main lines of evidence to conclude that cold mid-latitude winters are coincident with Arctic ice loss. Andrew Freedman, chicagotribune.com, 19 Aug. 2019 Microsoft has a year to figure out this last mode, because the Surface Neo won’t be released until the end of 2020, coincident with the Windows 10X OS that’s optimized for the Surface Neo. Gordon Mah Ung, PCWorld, 2 Oct. 2019 Study co-author James Screen, a researcher at the University of Exeter, says the study relies on three main lines of evidence to conclude that cold mid-latitude winters are coincident with Arctic ice loss. Andrew Freedman, chicagotribune.com, 19 Aug. 2019 See More
Word History
Etymology
borrowed from Medieval Latin coincident-, coincidens, present participle of coincidere "to agree in nature, coincide"