643 entries under adjective topic. ×

12
spiritless(dull, cool, weak, cold)
12
stagnant(calm, dull, quiet, hard)
12
unfeeling(cool, cold, indifferent, unfriendly)
11
asleep(calm, cold, indifferent, still)
11
bushed(health, beat, weak, informal)
11
fatigued(health, beat, weak, gloomy)
11
insensitive(dull, quiet, flat, cold)
11
jejune(dull, weak, flat, stupid)
11
prosaic(dull, weak, simple, flat)
11
still(calm, dull, quiet, flat)
11
weary(health, beat, weak, informal)
10
absolute(verb, complete, total, big)
10
callous(dull, quiet, flat, cold)
10
drained(health, beat, weak, weary)
10
empty(dull, negative, blank, bare)
10
humdrum(dull, simple, flat, plain)
10
inorganic(characteristic, lifeless, organic, nonliving)
10
insentient(cold, unfeeling, senseless, lifeless)
10
late(dull, low, lifeless, live)
10
pooped(health, beat, weak, slang)
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APASmart Define. (2016). dead thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/dead/thesaurus/synonyms
ChicagoSmart Define. 2016. "dead thesaurus" https://smartdefine.org/dead/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, dead thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/dead/thesaurus/synonyms>.
MLASmart Define. "dead thesaurus" 18 March 2016. Web. 23 September 2026. <https://smartdefine.org/dead/thesaurus/synonyms>