1
weather balloon
1
ytterbium(noun, element)
1
yttrium(noun, element)
1
zinc(noun, element)
1
zirconium(noun, element)
0
ammonia(noun, gas)
0
argon(noun, element, gas)
0
atomic number 2
0
neon(noun, element, gas)
0
silver(noun, element)
0
xenon(noun, element, gas)
0
chlorine(noun, element, gas)
0
element(noun, element)
0
fluorine(noun, element)
0
germanium(noun, element)
0
inert gas(expression, idiom)
0
nobelium(noun, element)
0
noble gas(expression, idiom)
0
plutonium(noun, element)
0
radon(noun, element)
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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>