Invalid and Untenable

Invalid adjective - Having no basis in reason or fact.

Untenable is a synonym for invalid in false topic. In some cases you can use "Untenable" instead an adjective "Invalid", when it comes to topics like unjustified, unfounded.

Nearby Words: invalidate, invalidated, invalidity, invalided, invalidation

Untenable adjective - (of theories etc) incapable of being defended or justified.

Invalid is a synonym for untenable in false topic. You can use "Invalid" instead an adjective "Untenable", if it concerns topics such as indefensible.