unsound vs rotten

unsound and rotten both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unsound	No	Yes	No	No
rotten	No	Yes	No	No

unsound (adjective)	rotten (adjective)
not sound financially	having decayed or disintegrated; usually implies foulness
not in good condition; damaged or decayed	damaged by decay; hence unsound and useless
suffering from severe mental illness	very bad
containing or based on a fallacy
physically unsound or diseased
of e.g. advice