Ranked by relevance and common usage.
Keep "heartburning" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "heartburning" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "heartburning", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "heartburning" or choose a simpler alternative from the closest-match group.
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
4 total sentences available.
[N]ecessity may abolish any law, but cannot alter the sentiments of the vulgar; right of inheritance being perhaps the most popular of all topicks; and therefore in great changes, when that is broke, there will remain much heart-burning and discontent among the meaner people; which (under a weak prince and corrupt administration) may have the worst consequences upon the peace of any state.
Source: wiktionary
[John] Winthrop, acting with the concurrence of Wilson, whom the delicacy of his position compelled to reserve, with difficulty succeeded in parrying the blow. But the transaction did not fail to leave heart-burnings.
Source: wiktionary
Such speeds are called for on a schedule of this sort, and the unconventional appearance was justified and necessary; but it caused many heartburnings, particularly amongst the older generation, from an aesthetic point of view.
Source: wiktionary
Hee sett Promethius, on a merrye pynn, / Whoe dranke soe devillishly, that there he gott / A terrible heartburninge, […]
Source: wiktionary
Closest matches include acerbity, acid, acidity, acrimony, animosity.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.