There are several words (adjectives) that mean that things are happening at the same time.
Simultaneous means things are existing or occurring at exactly the same time in a moment of time.
The simultaneous radio broadcast made it appear as if the fireworks were choreographed to the music.
Synchronous implies exact correspondence in time as well as periodic intervals.
here was one kid at summer camp who could not beat a drum in a synchronous manner with the others around the campfire.
Concurrent means operating in parallel at the same time, usually under separate authority.
he City of Houston, Harris County, State of Texas, and US Federal government have concurrent jurisdiction over this area.
Contemporary and contemporaneous both mean during the same time, but contemporary usually refers to people, while contemporaneous refers to events. Both terms denote a period of years, rather than shorter time periods.
Winston Churchill and Dwight D. Eisenhower were contemporary statesmen in the UK and US, respectively.
A rise in oil prices is often contemporaneous with oil company stock prices increasing.
Coincident means two events happened at the same time, but did not have a cause and effect relationship.
Global warming and the rise in greenhouse gases are coincident, since global warming also happened before the industrial age.
Profound Quote of the Day:
“No philosopher understands his predecessors until he has re-thought their thought in his own contemporary terms.”
– Peter Frederick Strawson, English philosopher and Oxford professor, 1919-2006