Synonyms for Oncoming:

adj.

coming (adjective)
close.
ensuing (adjective)
approaching.
oncoming (adjective)
advancing, expected, imminent, approaching.

n.

ahead, direct, bound for something, across, from all sides, forward, Into, advancing, up. shortly, soon, in no time (at all), close, in the short run/term, around the corner, at the earliest/first opportunity, just, any day/moment etc. now. impending (noun)
approaching, imminent, expected.

Other synonyms:

advancing. direct. across, forward, Into, ahead. up. Other relevant words:
ahead, approaching, expected, soon, advancing, close, shortly, around the corner, up, forward, across, direct, imminent, Into, just.

Usage examples for oncoming

  1. There was no desire in her heart but for her son, and no comfort in the prospect of her oncoming night. – The Bondboy by George W. (George Washington) Ogden
  2. He had the body of a bullock- short, thick, broad, strong, thoroughly well calculated to withstand the rushes of oncoming three- quarters. – The Prelude to Adventure by Hugh Walpole
  3. I turned to look eastward, following in fancy the course he had sketched; the waters were still as the footstep of the oncoming twilight, and, floating in a pool of soft purple, Deadman's Island rested like a large circle of candle moss. – Legends of Vancouver by E. Pauline Johnson