persistent vs unforgettable

persistent and unforgettable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
persistent	No	Yes	No	No
unforgettable	No	Yes	No	No

persistent (adjective)	unforgettable (adjective)
retained; not shed	impossible to forget
never-ceasing
stubbornly unyielding
continually recurring to the mind