Synonyms|296Antonyms|99|Broader|12Narrower|4Related|201
1
irksomeness(noun, melancholy, dullness, apathy, indifference)
1
jadedness(noun, melancholy, dullness, apathy, indifference)
1
lack of interest(noun, expression, idiom, melancholy, dullness)
1
lassitude(noun, melancholy, dullness, apathy, indifference)
1
level
1
likeness(noun, routine, dullness, consistency, tedium)
1
listlessness(noun, melancholy, dullness, apathy, indifference)
1
lowness
1
malaise
1
mesa(noun, prairie)
1
monotomy(noun, routine, dullness, slowness, tedium)
1
monotone(noun, routine, dullness, tedium, monotony)
1
moor(noun, prairie)
1
murk
1
muteness(noun, non-resonance)
1
nausea
1
non-resonance(noun, non-resonance)
1
old chestnut(expression, dull, dullness, commonplace, tag)
1
old story(expression, dull, dullness, commonplace, tag)
1
oneness(noun, routine, dullness, tedium, monotony)
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APASmart Define. (2015). flatness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/flatness/thesaurus/synonyms
ChicagoSmart Define. 2015. "flatness thesaurus" https://smartdefine.org/flatness/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, flatness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/flatness/thesaurus/synonyms>.
MLASmart Define. "flatness thesaurus" 15 June 2015. Web. 21 September 2026. <https://smartdefine.org/flatness/thesaurus/synonyms>