Harmless antonyms

What is the opposite word for Harmless?

Use filters to view other words, we have 77 antonyms for harmless.
Antonyms for harmless
Filters
Filter antonyms by Letter
A B C D E F H I J L M N O P R S T U V W
Filter by Part of speech
adjective
noun
Suggest
If you know antonyms for Harmless, then you can share it or put your rating in the list of opposite words.
Suggest antonym
Menu
Harmless Thesaurus
Definitions of Harmless
Harmless Synonyms
Nearby Words
harmful, harm, harmlessly
External Links
Other usefull sites with antonyms of this word:
Synonym.tech
Merriam-webster.com
Collinsdictionary.com
Wiktionary.org
Opposite words of harmless
Photo search results for Harmless
Ethnic man with dog on metal chain Cute little gray tiger cat walking on grassy backyard
Image search results for Harmless
wolf in sheep's clothing, wolf, sheep butterfly, yellow, grass gecko, tarentola mauritanica, reptile dog, pets, look at the dog dog, pets, look at the dog chinese water dragon, male chinese water dragon, chinese
Cite this Source
Antonyms for Harmless. (2016). Retrieved 2026, July 19, from https://thesaurus.plus/antonyms/harmless
Antonyms for Harmless. N.p., 2016. Web. 19 Jul. 2026. <https://thesaurus.plus/antonyms/harmless>.
Antonyms for Harmless. 2016. Accessed July 19, 2026. https://thesaurus.plus/antonyms/harmless.