Synonyms of 'harmless'
1 safeDictionary, benign, wholesome
working at developing harmless substitutes for these gases
2 inoffensiveDictionary, innocent, innocuous
He seemed harmless enough.
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A benign tumour will not cause death or serious harm.
It wasn't cancer, only a benign tumour.
Thesaurus for harmless from the Collins English Thesaurus
Something that is harmless does not have any bad effects, especially on people's health .