unsound Antonyms

sound sustainable sure surd reasonable sturdy strong strengthy strapping thoroughpaced thriving trusty trustworthy true tried toughish tough toning tintinnabulation stoner steady reliable right right-minded rigorous robust safe salubrious sane sapient secure sensible sober solid stable stalwart statistical steadfast trysting tuff fastball watertight Salem unswerving solid-state alive and kicking unattackable self-consistent positivistic salah