Synonyms of harmless in English:

harmless


See definition of harmless

adjective

1‘a harmless substance’

SYNONYMS
safe, innocuous, benign, gentle, mild, wholesome, non-dangerous, non-toxic, non-poisonous, non-irritant, non-addictive
rare innoxious
ANTONYMS

dangerous, harmful

2‘he seems harmless enough’

SYNONYMS
inoffensive, innocuous, unobjectionable, unexceptionable, unoffending, tame, gentle
ANTONYMS

objectionable