6
uncaring(adjective, indifferent, detached, unfriendly, distant)
6
unenthusiastic(adjective, cool, indifferent, unfriendly, aloof)
6
unimpassioned(adjective, cool, unfriendly, aloof, distant)
5
calm(adjective, detached, unemotional, composed, unexcitable)
5
chilly(adjective, cold, detached, unfriendly, unresponsive)
5
cold-blooded(adjective, cool, detached, unfriendly, blank)
5
dull(adjective, calm, quiet, flat, slow)
5
frosty(adjective, cool, cold, detached, unfriendly)
5
impassible(adjective, dull, quiet, flat, heavy)
5
materialistic(feature, person, spirit)
5
numb(adjective, insensitive, unexcitable)
5
objective(adjective, indifferent, detached, distant, apathetic)
5
passive(adjective, calm, dull, flat, cold)
5
unconcerned(adjective, calm, cool, indifferent, detached)
4
insusceptible(adjective, cool, blank, aloof, unemotional)
4
phlegmatic(adjective, calm, cool, indifferent, detached)
4
reserved(adjective, cool, detached, unfriendly, blank)
4
unaffected
4
undemonstrative(adjective, calm, dull, cool, flat)
4
unloving(adjective, cold, detached, unfriendly, unresponsive)
11 years ago|6.3k views|share |citing 
APASmart Define. (2015). passionless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/passionless/thesaurus/synonyms
ChicagoSmart Define. 2015. "passionless thesaurus" https://smartdefine.org/passionless/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, passionless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/passionless/thesaurus/synonyms>.
MLASmart Define. "passionless thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/passionless/thesaurus/synonyms>