30 entries under expression topic. ×

2
heavy hydrogen
2
chemical element
1
jet fuel(idiom, fuel)
1
natural gas(idiom, fuel)
1
synthesis gas(idiom, fuel)
1
synthetic gas(idiom, fuel)
0
arsenious acid(idiom, bane)
0
arsenious oxide(idiom, bane)
0
atomic number
0
bichloride of mercury(idiom, bane)
0
carbonic acid(idiom, bane)
0
carbonic gas(idiom, bane)
0
chemical element h
0
choke damp(idiom, bane)
0
corrosive sublimate(idiom, bane)
0
fire damp(idiom, bane)
0
fuel oil(idiom, fuel)
0
heating oil(idiom, fuel)
0
helium balloon(idiom, levity)
0
high octane gasoline(idiom, fuel)
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APASmart Define. (2015). hydrogen thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/hydrogen/thesaurus/synonyms
ChicagoSmart Define. 2015. "hydrogen thesaurus" https://smartdefine.org/hydrogen/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, hydrogen thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/hydrogen/thesaurus/synonyms>.
MLASmart Define. "hydrogen thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/hydrogen/thesaurus/synonyms>