What is the opposite of unsound?

Need antonyms for unsound? Here's a list of words from our thesaurus that you can use instead.

Adjective
Opposite for not based on sound or reliable evidence or reasoning
Adjective
Opposite for not firm
Adjective
Opposite for not being in agreement with what is true
Adjective
Opposite for not using or following good reasoning
Adjective
Opposite for temporarily suffering from a disorder of the body
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