unappreciated vs unrewarding

unappreciated and unrewarding both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unappreciated	No	Yes	No	No
unrewarding	No	Yes	No	No

unappreciated (adjective)	unrewarding (adjective)
having value that is not acknowledged	not rewarding; not providing personal satisfaction
not likely to be rewarded