contemporaneous
Existing at once
Contemporaneous means existing or occurring at the same time: The two civilizations were roughly contemporaneous.
The word appears most often in formal or academic contexts, describing events, documents, or phenomena that overlap in time: contemporaneous accounts of the battle, contemporaneous with the founding of the republic.
It's a more precise, scholarly alternative to contemporary.
Happening at once
- coexistingExisting at once
- synchronousOccurring at same moment
- coincidentOccurring simultaneously
- coincidingOccurring at same time
parallel · simultaneous · concomitant · overlapping · coterminous · coextensive · real-time · live
Happening at once
- coexistingExisting at once
- contemporaneityExisting in same period
- attestationFormal declaration confirming truth
- documentationWritten proof or instructions
witness · testimony · corroboration · authentication · verification · evidentiary · deposition · affidavit
Punctuation ending sentences
- eraDistinct historical period
- epochDistinct historical period
- ageDuration of existence
- datingPursuing romantic connections
chronicle · annals · archives · contemporaneity · coexistence · periodization · timeline · carbon-dating
concurrent
Happening at once
- coexistingExisting at once
- synchronousOccurring at same moment
- coincidentOccurring simultaneously
coinciding · parallel · simultaneous · concomitant · overlapping · coterminous · coextensive · real-time · live · synchronic
concurrent
Happening at once
- coexistingExisting at once
- contemporaneityExisting in same period
- attestationFormal declaration confirming truth
documentation · witness · testimony · corroboration · authentication · verification · evidentiary · deposition · affidavit · notarized
period
Punctuation ending sentences
dating · chronicle · annals · archives · contemporaneity · coexistence · periodization · timeline · carbon-dating · provenance
contemporaneousasynchronous
Not happening together
nonsimultaneous · nonsynchronous · sequential · out of sync · successive
contemporaneoussequential
Occurring in succession
successive · staggered · serial · diachronic · consecutive
contemporaneousancient
Very old indeed
antediluvian · antique · archaic · prehistoric · primeval