risky vs unsound

risky and unsound both are adjectives.

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

risky (adjective)	unsound (adjective)
involving risk or danger	not sound financially
not financially safe or secure	not in good condition; damaged or decayed
	suffering from severe mental illness
	containing or based on a fallacy
	physically unsound or diseased
	of e.g. advice