438 entries under adjective topic. ×

4
impassible(dull, quiet, flat, heavy)
4
indolent(dull, slow, careless, relaxed)
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insouciant(lethargic, languid, indolent)
4
lackluster(dull, excite, sad, boring)
4
lymphatic(action, weak, heavy, still)
4
mechanical(done, powered, motorized, power-driven)
4
modest(quiet, gentle, nervous, humble)
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monotonous(dull, weak, cold, stupid)
4
motionless(dull, cold, lifeless, nonliving)
4
pallid(pale, white, colorless)
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pessimistic(blue, sad, unhappy, miserable)
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remote(unfriendly, unemotional, emotionless, taciturn)
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reserved(cool, unfriendly, blank, aloof)
4
slow(dull, weak, easy, relaxed)
4
stiff(dull, hard, careless, indifferent)
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stodgy(dull, flat, excite, stupid)
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supine(dull, weak, easy, slow)
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tepid(dull, warm, indifferent, boring)
4
undemonstrative(cool, unfriendly, aloof, distant)
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unhappy(blue, happy, sad, miserable)
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APASmart Define. (2015). spiritless thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/spiritless/thesaurus/synonyms
ChicagoSmart Define. 2015. "spiritless thesaurus" https://smartdefine.org/spiritless/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, spiritless thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/spiritless/thesaurus/synonyms>.
MLASmart Define. "spiritless thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/spiritless/thesaurus/synonyms>