7
food additive
3
alkaloid
3
stimulant(noun, substance, matter, chemistry)
2
xanthine(noun, substance, matter, chemistry)
1
narcotic
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APASmart Define. (2015). caffeine thesaurus. Retrieved April 24, 2019, from https://smartdefine.org/caffeine/thesaurus/broader
ChicagoSmart Define. 2015. "caffeine thesaurus" https://smartdefine.org/caffeine/thesaurus/broader (accessed April 24, 2019).
HarvardSmart Define 2015, caffeine thesaurus, Smart Define, viewed 24 April, 2019, <https://smartdefine.org/caffeine/thesaurus/broader>.
MLASmart Define. "caffeine thesaurus" 13 April 2015. Web. 24 April 2019. <https://smartdefine.org/caffeine/thesaurus/broader>