yen vs languish

yen is a noun but languish is not a noun.

Word	Noun	Adjective	Verb	Adverb
yen	Yes	No	Yes	No
languish	No	No	Yes	No

As verbs, yen and languish are synonyms defined as:

yen and languish: have a desire for something or someone who is not present

Other synonyms of yen include ache, pine, yearn.

yen (noun)	languish (noun)
a yearning for something or to do something
the basic unit of money in Japan; equal to 100 sen

yen (verb)	languish (verb)
have a desire for something or someone who is not present	become feeble
	lose vigor, health, or flesh, as through grief
	have a desire for something or someone who is not present