5
anodyne(adjective, innocent, inoffensive, innocuous, benign)
5
atoxic
5
reliable(adjective, clear, sound, gentle, pure)
5
sure(adjective, sound, gentle, innocent, safe)
5
tame(adjective, clear, pure, healthy, safe)
5
trustworthy(adjective, clear, sound, gentle, pure)
4
advantageous(adjective, clean, pure, fresh, useful)
4
beneficial(adjective, clean, pure, fresh, useful)
4
blameless(adjective, right)
4
blessed(adjective, good feeling)
4
good(adjective, clear, fit, clean, pure)
4
helpful(adjective, clean, pure, fresh, useful)
4
kind(adjective, sound, gentle, innocent, bland)
4
manageable(adjective, sound, gentle, mild, innocent)
4
nonpoisonous(adjective, clear, pure, healthy, safe)
4
pure(adjective, good, clear, clean, fresh)
4
riskless(adjective, clear, pure, healthy, safe)
4
uninjurious(adjective, clear, pure, healthy, safe)
3
a little dangerous
3
artless(adjective, simple, kindly, innocent, ignorant)
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APASmart Define. (2016). harmless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/harmless/thesaurus/synonyms
ChicagoSmart Define. 2016. "harmless thesaurus" https://smartdefine.org/harmless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, harmless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/harmless/thesaurus/synonyms>.
MLASmart Define. "harmless thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/harmless/thesaurus/synonyms>