espresso vs java

espresso and java both are nouns.

Word	Noun	Adjective	Verb	Adverb
espresso	Yes	No	No	No
java	Yes	No	No	No

As nouns, java is a hypernym of espresso; that is, java is a word with a broader meaning than espresso:

espresso: strong black coffee brewed by forcing hot water under pressure through finely ground coffee beans
java: a beverage consisting of an infusion of ground coffee beans

Other hypernyms of espresso include coffee.

espresso (noun)	java (noun)
strong black coffee brewed by forcing hot water under pressure through finely ground coffee beans	a beverage consisting of an infusion of ground coffee beans