Thesaurus.com
Dictionary.com
Showing results for caffeine. Search instead for piekfeinem.
Definitions

caffeine

[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /
NOUN
coffee
Synonyms
STRONGEST
cappuccino espresso
STRONG
brew decaf decoction demitasse ink java mocha mud perk
WEAK
battery acid café café au lait café noir forty weight hot stuff jamocha joe varnish remover

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Anyone with these conditions should discuss caffeine intake with their doctor.

From Science Daily • May 18, 2026

Regular coffee drinkers also tend to clear caffeine from the body more efficiently.

From Science Daily • May 18, 2026

Genetics can also play a role in how much coffee people enjoy, influencing both caffeine metabolism and the brain's reward system.

From Science Daily • May 18, 2026

Genetics also play a role, since some people naturally break down caffeine faster than others.

From Science Daily • May 18, 2026

I had been cultivating a headache for the last few hours—the kind of headache that felt like it was going to pop my eyes right out of my skull—and caffeine usually helped.

From "Darius the Great Is Not Okay" by Adib Khorram

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "caffeine" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com