| oxygen(noun, element, gas) | |
| He | |
| gas(noun, gas) | |
| liquid nitrogen(expression, idiom, cold, refrigerator) | |
| rarefaction(noun, gas) | |
| nitrogen(noun, element, gas) | |
| hydrogen(noun, element, gas) | |
| arsenic(noun, element) | |
| astatine(noun, element) | |
| berkelium(noun, element) | |
| beryllium(noun, element) | |
| bismuth(noun, element) | |
| boron(noun, element) | |
| bromine(noun, element) | |
| butane(noun, gas) | |
| cadmium(noun, element) | |
| calcium(noun, element) | |
| californium(noun, element) | |
| carbon(noun, element) | |
| carbon-dioxide |
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| APA | Smart Define. (2015). helium thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/helium/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "helium thesaurus" https://smartdefine.org/helium/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, helium thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/helium/thesaurus/synonyms>. |
| MLA | Smart Define. "helium thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/helium/thesaurus/synonyms> |