30 entries under expression topic. ×
| hot air balloon(idiom, levity) | |
| hydrocyanic acid(idiom, bane) | |
| lighter-than-air balloon(idiom, levity) | |
| liquid hydrogen(idiom, fuel) | |
| liquid oxygen(idiom, fuel) | |
| marsh gas(idiom, bane) | |
| number oil(idiom, fuel) | |
| nux vomica(idiom, bane) | |
| of hydrogen | |
| rocket fuel(idiom, fuel) |
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| APA | Smart Define. (2015). hydrogen thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/hydrogen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hydrogen thesaurus" https://smartdefine.org/hydrogen/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, hydrogen thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/hydrogen/thesaurus/synonyms>. |
| MLA | Smart Define. "hydrogen thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/hydrogen/thesaurus/synonyms> |