Find Synonyms

radioactivity Synonyms

Another word for radioactivity

Choosing another word for radioactivity depends on context, so the synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
JUMP TO:

• noun (Context 1)

The spontaneous emission of ionizing radiation or subatomic particles caused by the disintegration of unstable atomic nuclei.

Usage Example

"Henri Becquerel discovered natural radioactive decay while studying the properties of uranium salts."

Strongest
radioactive decay
nuclear decay

• noun (Context 2)

Particles or rays emitted by the nuclear decay of radioactive substances, or the presence of such hazardous emissions in an environment.

Usage Example

"Inspectors used Geiger counters to measure the level of radiation in the soil around the decommissioned power plant."

Strong
radiation
Weak
fallout

• Nearby Words

radicchio
radio
radioactive
radioactivity
radiobroadcaster
radiogram
radiographer

Cite this Entry

Wordmom. (2026). Synonyms for Radioactivity. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/radioactivity
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.