I. noun
Synonyms: occurrence , circumstance, episode, event, go, happening, occasion, things
II. adjective
1.
Synonyms: concomitant , accompanying, ancillary, attendant, attending, coincident, collateral, satellite
Antonyms: essential, fundamental
2.
Synonyms: related , affiliated, agnate, akin, allied, cognate, connate, connatural, consanguine, kindred