4
grow hot(verb, expression, warm, heat, reheat)
4
grow warm(verb, expression, warm, heat, reheat)
4
humidity(noun, warmth, weather, closeness, vaporization)
4
ignite(verb, warm, heat, reheat, burn)
4
incinerate(verb, warm, heat, reheat, burn)
4
inflame(verb, warm, heat, reheat, burn)
4
kindle(verb, warm, heat, reheat, burn)
4
mugginess(noun, wet, warmth, closeness, steam)
4
oxidate(verb, warm, heat, reheat, burn)
4
oxidize(verb, warm, heat, reheat, burn)
4
raise the temperature(verb, expression, idiom, warm, heat)
4
reheat(verb, warm, heat, burn, boil)
4
set on fire(verb, expression, idiom, warm, heat)
4
smelt(verb, warm, heat, reheat, burn)
4
tepefy(verb, warm, heat, reheat, burn)
4
thaw(verb, warm, heat, reheat, burn)
4
warm up(verb, expression, warm, heat, reheat)
3
ooze(verb, glow, leak, emit, sweat)
3
be in heat(expression, idiom)
3
beads of sweat(expression, idiom)
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APASmart Define. (2015). swelter thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/swelter/thesaurus/synonyms
ChicagoSmart Define. 2015. "swelter thesaurus" https://smartdefine.org/swelter/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, swelter thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/swelter/thesaurus/synonyms>.
MLASmart Define. "swelter thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/swelter/thesaurus/synonyms>