30 entries under harmless topic. ×

8
nonpoisonous(adjective, clear, sound, pure, healthy)
7
innocent(adjective, clear, sound, simple, gentle)
5
innocuous(adjective, clear, sound, simple, gentle)
5
anodyne(adjective, innocent, inoffensive, innocuous, benign)
5
safe(adjective, sound, simple, gentle, innocent)
3
clear(adjective, pure, healthy, safe, innocuous)
2
benign(adjective, innocuous)
2
inoffensive(adjective, clear, sound, simple, gentle)
1
certain(adjective, clear, sound, pure, healthy)
1
checked(adjective, clear, sound, pure, healthy)
1
competent(adjective, clear, sound, pure, healthy)
1
decontaminated(adjective, clear, pure, healthy, safe)
1
dependable(adjective, clear, sound, pure, healthy)
1
healthy(adjective, clear, sound, pure, safe)
1
innoxious(adjective, clear, sound, simple, gentle)
1
neutralized(adjective, clear, sound, pure, healthy)
1
not dangerous(expression, adjective, idiom, clear, sound)
1
risk-free(adjective, clear, sound, pure, healthy)
1
riskless(adjective, clear, sound, pure, healthy)
1
secure(adjective, clear, sound, pure, healthy)
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APASmart Define. (2015). nontoxic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/nontoxic/thesaurus/synonyms
ChicagoSmart Define. 2015. "nontoxic thesaurus" https://smartdefine.org/nontoxic/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, nontoxic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/nontoxic/thesaurus/synonyms>.
MLASmart Define. "nontoxic thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/nontoxic/thesaurus/synonyms>