# simultaneous

> English word · Adjective · IPA /ˌsɪm.əlˈteɪ̯.ni.əs/ · frequency rank #14,414

## Definitions
1. Happening at the same moment.
2. To be solved for the same values of variables.

## Etymology
From Medieval Latin simultaneus, from simultim (“at the same time, extended”), from Latin simul (“together, at the same time”); compare similar.

## Easily confused with
- **simultaneously** (https://plainspell.com/en/vs/simultaneous-vs-simultaneously)

## Common misspellings (17)
`ismultaneous`, `simlutaneous`, `simmultaneous`, `simulatneous`, `simulltaneous`, `simultaenous`, `simultaneosu`, `simultaneouss`, `simultaneuos`, `simultanneous`, `simultanoeus`, `simultnaeous`, `simulttaneous`, `simutlaneous`, `siumltaneous`, `smiultaneous`, `ssimultaneous`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/simultaneous