Ranked by relevance and common usage.
Keep "dulness" 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 "dulness" 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 "dulness", 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 "dulness" 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.
He then sat down to contemplate, at his ease, that vivacity without motive, and without aim, which is found in most numerous assemblies; mediocrity in Italy is by no means a disagreeable character; it has little vanity, little jealousy, and much respect for superiority of mind; and if it fatigues with its dulness, it hardly ever offends by assuming.
Source: wiktionary
At first it was downright dulness to Emma. She had never seen Frank Churchill so silent and stupid. He said nothing worth hearing — looked without seeing — admired without intelligence — listened without knowing what she said.
Source: wiktionary
A smack of all Human Life lies in the Tailor: its wild struggles towards beauty, dignity, freedom, victory; and how, hemmed in by Sedan and Huddersfield, by Nescience, Dulness, Prurience, and other sad necessities and laws of Nature, it has attained just to this: Grey Savagery of Three Sacks with a hem!
Source: wiktionary
When all signs of effusion, dulness, pain, œgophony, and cough had disappeared he was dieted, stimulated, and tonicked.
Source: wiktionary
Closest matches include deadness, dullness, flatness, insipidity, obtuseness.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.