noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The quality or state of being simultaneous; simultaneity. uncountable
2. 2
   happening or existing or done at the same time wordnet

Synonyms

All synonyms

simultaneitycoincidenceconcurrentnesssimultaneitysynchroneitysynchronicity

Antonyms

All antonyms

asynchronicityasynchronismasynchronizationasynchronousness

Etymology

From simultaneous + -ness.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.