pine vs ache

pine and ache both are nouns.

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

As verbs, pine and ache are synonyms defined as:

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

Other synonyms of pine include languish, yearn, yen.

pine (noun)	ache (noun)
a coniferous tree	a dull persistent (usually moderately intense) pain
straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus

pine (verb)	ache (verb)
have a desire for something or someone who is not present	have a desire for something or someone who is not present
	be the source of pain
	feel physical pain