Caffeine and Morphine

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Caffeine noun - A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects.

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Morphine and caffeine are semantically related. In some cases you can use "Morphine" instead a noun "Caffeine".

Morphine noun - An alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain.

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Caffeine and morphine are semantically related. You can use "Caffeine" instead a noun "Morphine".

Nearby Words: morphinism, morphia

That said, most drugs are naturally bitter because many of them were originally derived from vegetable alkaloids (examples include caffeine, digoxin, nicotine, morphine, etc), a groups of bitter-tasting and poisonous chemicals produced by plants to discourage animals and insects from eating them.

Source: If It Tastes Bad, It Must Be Good for You

Cite this Source

Morphine and Caffeine. (2016). Retrieved 2026, July 30, from https://thesaurus.plus/related/caffeine/morphine

Caffeine & Morphine. N.p., 2016. Web. 30 Jul. 2026. <https://thesaurus.plus/related/caffeine/morphine>.

Morphine or Caffeine. 2016. Accessed July 30, 2026. https://thesaurus.plus/related/caffeine/morphine.

Google Ngram Viewer shows how "caffeine" and "morphine" have occurred on timeline