| phosphorus(noun, element) | |
| platinum(noun, element) | |
| polonium(noun, element) | |
| potassium(noun, element) | |
| praseodymium(noun, element) | |
| promethium(noun, element) | |
| protactinium(noun, element) | |
| radiation | |
| radioactive isotopes(expression, idiom, calefaction) | |
| radioactivity | |
| radioelement | |
| rhenium(noun, element) | |
| rhodium(noun, element) | |
| rubidium(noun, element) | |
| ruthenium(noun, element) | |
| samarium(noun, element) | |
| scandium(noun, element) | |
| selenium(noun, element) | |
| silicon(noun, element) | |
| sodium(noun, element) |
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| APA | Smart Define. (2015). plutonium thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/plutonium/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "plutonium thesaurus" https://smartdefine.org/plutonium/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, plutonium thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/plutonium/thesaurus/synonyms>. |
| MLA | Smart Define. "plutonium thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/plutonium/thesaurus/synonyms> |