simultaneous.

Happening or existing at the same time.

Use it for

Words that belong together

• simultaneous events
• simultaneous changes

On the page

Simultaneous changes made it hard to identify the decisive cause.

Usage notes

Primary category: academic / formal. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: analysis, evaluation, qualification. Commonness: moderately common.