135 entries under adjective topic. ×

8
impassive(hard, careless, indifferent, cruel)
8
insusceptible(hard, affect, dead, insensitive)
8
unsusceptible(hard, careless, indifferent, cruel)
6
unfeeling(hard, careless, indifferent, cruel)
5
heartless(hard, careless, indifferent, cruel)
5
impassible(hard, affect, dead, impassive)
5
insensitive(hard, careless, indifferent, cruel)
5
spiritless(hard, careless, indifferent, cruel)
5
unemotional(hard, detached, unfeeling, unsympathetic)
4
cold(hard, careless, indifferent, cruel)
4
cold-blooded(hard, careless, indifferent, cruel)
4
passionless(detached, impassive, unresponsive, insensitive)
4
soulless(hard, careless, indifferent, cruel)
3
anesthetized(dead, insensitive, insusceptible)
3
callous(hard, cruel, detached, unfeeling)
3
coldhearted(hard, detached, unfeeling, unsympathetic)
3
cool(detached, impassive, unresponsive, reticent)
3
dead(informal, insensitive, insusceptible)
3
dispassionate(detached, impassive, unresponsive, reticent)
3
frigid(detached, impassive, unresponsive, laid-back)
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APASmart Define. (2015). unimpressionable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unimpressionable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unimpressionable thesaurus" https://smartdefine.org/unimpressionable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unimpressionable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unimpressionable/thesaurus/synonyms>.
MLASmart Define. "unimpressionable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unimpressionable/thesaurus/synonyms>