Harmful
Harmful adjective - Causing or capable of causing harm.
Radioactive and harmful are semantically related. In some cases you can use "Radioactive" instead an adjective "Harmful".
Radioactive
Radioactive adjective - Exhibiting or caused by radioactivity.
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Synonyms for Radioactive
Harmful and radioactive are semantically related. You can use "Harmful" instead an adjective "Radioactive".
Nearby Word: radioactivity
Both words in one sentence
- Kryptonite is now harmful to non-Kryptonians as well in a manner similar to other radioactive materials, requiring sufficient long term exposure over a matter of months or years.
Source: Comic Book / Post-Crisis - Real-life radiation shielding mainly concerns huge slabs of lead and the radiation itself is understood as harmful electromagnetic energy emitted by uranium and other radioactive materials.
Source: Fantastic Radiation Shielding -
Growing up in a radioactive wasteland with a thin ozone layer can be harmful... An Axe to Grind: The Proton Ax, found in a deserted building guarded by one of the game's most powerful enemies.
Source: Video Game / Wasteland
Cite this Source
Radioactive and Harmful. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/harmful/radioactive
Harmful & Radioactive. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/harmful/radioactive>.
Radioactive or Harmful. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/harmful/radioactive.
Google Ngram Viewer shows how "harmful" and "radioactive" have occurred on timeline