Synonyms of harmless
1 safeDictionary • working at developing harmless substitutes for these gases
safe • a clean, inexpensive and safe fuel
benign • It wasn't cancer, only a benign tumour.
wholesome • The food was filling and wholesome.
2 inoffensiveDictionary • He seemed harmless enough.
inoffensive • He's a mild, inoffensive man.
innocent • It was probably an innocent question, but he got very flustered.
innocuous • Both mushrooms look innocuous, but are in fact deadly.
tame • tame animals at a children's zoo or farm
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benignA benign tumour will not cause death or serious harm.
• It wasn't cancer, only a benign tumour.
• It was probably an innocent question, but he got very flustered.
Thesaurus for harmless from the Collins English Thesaurus
not causing any physical or mental damage or injury