unsound vs unreliable

unsound and unreliable both are adjectives.

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

unsound (adjective)	unreliable (adjective)
not sound financially	not worthy of reliance or trust
not in good condition; damaged or decayed	dangerously unstable and unpredictable
suffering from severe mental illness	liable to be erroneous or misleading
containing or based on a fallacy	lacking a sense of responsibility
physically unsound or diseased
of e.g. advice