What context can I use each word in?
Learn when and how to use these words with these examples!
simultaneous
Example
The concert and the fireworks show were scheduled to start simultaneously. [simultaneously: adverb]
Example
The students took the exam simultaneously. [simultaneous: adjective]
parallel
Example
The train tracks run parallel to the highway. [parallel: adjective]
Example
The two projects are running in parallel, but they don't depend on each other. [parallel: adverb]
Good things to know
Which word is more common?
Parallel is more commonly used than simultaneous in everyday language. Parallel is versatile and covers a wide range of contexts, while simultaneous is less common and is typically used in more technical or formal contexts.
What’s the difference in the tone of formality between simultaneous and parallel?
Simultaneous is typically associated with a more technical or formal tone, while parallel is more versatile and can be employed in both formal and informal contexts.