yearn vs long

yearn is not an adjective while long is an adjective.

Word	Noun	Adjective	Verb	Adverb
yearn	No	No	Yes	No
long	No	Yes	Yes	Yes

As verbs, yearn and long are synonyms defined as:

Other synonyms of yearn include hanker.

As verbs, long is a hypernym of yearn; that is, long is a word with a broader meaning than yearn:

Other hypernyms of yearn include hanker, yearn.

yearn (adjective)	long (adjective)
	good at remembering
	primarily spatial sense; of relatively great or greater than average spatial extension or extension as specified
	primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified
	(of speech sounds or syllables) of relatively long duration
	holding securities or commodities in expectation of a rise in prices
	having or being more than normal or necessary
	planning prudently for the future
	of relatively great height
	involving substantial risk

yearn (verb)	long (verb)
desire strongly or persistently	desire strongly or persistently
have a desire for something or someone who is not present
have affection for; feel tenderness for

yearn (adverb)	long (adverb)
	for an extended time or at a distant time
	for an extended distance