unsound vs speculative

unsound and speculative both are adjectives.

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

unsound (adjective)	speculative (adjective)
not sound financially	showing curiosity
not in good condition; damaged or decayed	not based on fact or investigation
suffering from severe mental illness	not financially safe or secure
containing or based on a fallacy
physically unsound or diseased
of e.g. advice