1
gallium(noun, element)
1
gold(noun, element)
1
hafnium(noun, element)
1
holmium(noun, element)
1
indium(noun, element)
1
inert
1
iodine(noun, element)
1
iridium(noun, element)
1
iron(noun, element)
1
krypton(noun, element)
1
lanthanum(noun, element)
1
lead(noun, element)
1
light gas
1
lighter-than-air balloon(expression, idiom, levity)
1
lutetium(noun, element)
1
magnesium(noun, element)
1
manganese(noun, element)
1
mendelevium(noun, element)
1
mercury(noun, element)
1
methane(noun, gas)
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APASmart Define. (2015). helium thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/helium/thesaurus/synonyms
ChicagoSmart Define. 2015. "helium thesaurus" https://smartdefine.org/helium/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, helium thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/helium/thesaurus/synonyms>.
MLASmart Define. "helium thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/helium/thesaurus/synonyms>