languish vs pine

languish is not a noun while pine is a noun.

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

As verbs, languish and pine are synonyms defined as:

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

Other synonyms of languish include ache, yearn, yen.

languish (noun)	pine (noun)
	a coniferous tree
	straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus

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