30 entries under idiom topic. ×
| hot air balloon(expression, levity) | |
| hydrocyanic acid(expression, bane) | |
| lighter-than-air balloon(expression, levity) | |
| liquid hydrogen(expression, fuel) | |
| liquid oxygen(expression, fuel) | |
| marsh gas(expression, bane) | |
| number oil(expression, fuel) | |
| nux vomica(expression, bane) | |
| of hydrogen | |
| rocket fuel(expression, fuel) |
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| APA | Smart Define. (2015). hydrogen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hydrogen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hydrogen thesaurus" https://smartdefine.org/hydrogen/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, hydrogen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hydrogen/thesaurus/synonyms>. |
| MLA | Smart Define. "hydrogen thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/hydrogen/thesaurus/synonyms> |