Synonyms for Heartening:

• adj.

  •cheerful (adjective)
  • upbeat.
  •encouraging (adjective)
  • supportive,
  • reassuring.
  •heartwarming (adjective)
  • heartwarming.

• n.

  •
  • promising,
  • likely.

• v.

  •cheering (verb)
  • comforting,
  • consoling,
  • Gladdening,
  • pleasing,
  • enlivening,
  • lightening,
  • Brightening.

Antonyms for Heartening:

• adj.

  • Other antonyms:
    desperate, Dissatisfying, catastrophic, uncertain, minatory, disconcerting, unloving, unpromising, fatal, cheerless, funereal, ruinous, foreboding, unlikely, menacing, glum, ill, unpleasant, downbeat, calamitous, bleak, portentous, negative, threatening, gray, dismal, disastrous, dubious, inauspicious, dim, depressing, sinister, unhappy, direful, doubtful, grim, disheartening, saddening, dark, unfeeling, disappointing, futureless, miserable, heartbreaking, dispiriting, ominous, discouraging, pessimistic, upsetting, baleful, unpropitious, unlucky, demoralizing, distressing, hopeless, unfriendly, dire, dreary, unkind, wretched, disturbing, comfortless, gloomy, cold, bearish, Ill-boding, heartrending, unfavorable, doomy, unfortunate, unencouraging, dismaying, displeasing.