| radiant | |
| red hot | |
| reeking | |
| resolute | |
| ripe(adjective, keen, passionate, enthusiastic, ardent) | |
| scintillant | |
| scintillating | |
| scorching(adjective, hot, burning, white, glowing) | |
| searing(adjective, hot, white, glowing, fiery) | |
| self-starting(adjective, keen, passionate, enthusiastic, ardent) | |
| serious | |
| sincere | |
| sizzling(adjective, hot, burning, white, glowing) | |
| smouldering(adjective, hot, white, glowing, fiery) | |
| sprightly(adjective, vigorous) | |
| steaming | |
| steamy | |
| strenuous(adjective, vigorous) | |
| sweltering(adjective, heat, burning, fiery, scorching) | |
| virile(adjective, vigorous) |
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| APA | Smart Define. (2015). afire thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/afire/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "afire thesaurus" https://smartdefine.org/afire/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, afire thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/afire/thesaurus/synonyms>. |
| MLA | Smart Define. "afire thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/afire/thesaurus/synonyms> |