pine vs languish

pine is a noun but languish is not a noun.

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

As verbs, pine and languish are synonyms defined as:

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

Other synonyms of pine include ache, yearn, yen.

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

pine (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