50 entries under flat topic. ×

1
sombre(adjective, dull, boring, lifeless)
1
square(adjective, simple, clean, plain)
1
unchanged(adjective, dull, boring, tedious)
1
unchanging(adjective, dull, boring, tedious)
1
uniform(adjective, dull, boring, tedious)
1
uninflected(adjective, dull, boring, tedious)
1
unvarying(adjective, dull, boring, tedious)
1
vanilla(adjective, dull, weak, smooth, simple)
1
workaday(adjective, bad, simple, clean)
1
zero(adjective, dull, simple, clean)
<123>
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APASmart Define. (2015). ho-hum thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ho-hum/thesaurus/synonyms
ChicagoSmart Define. 2015. "ho-hum thesaurus" https://smartdefine.org/ho-hum/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, ho-hum thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ho-hum/thesaurus/synonyms>.
MLASmart Define. "ho-hum thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/ho-hum/thesaurus/synonyms>