controvertible

As adjectives the difference between controvertible and undefined

is that controvertible is open to questioning; that which can be denied, challenged, or disputed while undefined is lacking a definition or value.

As adjectives the difference between controvertible and proof

is that controvertible is open to questioning; that which can be denied, challenged, or disputed while proof is used in proving or testing.

As a noun proof is

an effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.

As a verb proof is

to proofread.

Problematical is a related term of controvertible.

As adjectives the difference between problematical and controvertible

is that problematical is doubtful or disputed while controvertible is open to questioning; that which can be denied, challenged, or disputed.

Debatable is a synonym of controvertible.

As adjectives the difference between debatable and controvertible

is that debatable is controversial not fully proved, open to debate, sometimes used humorously while controvertible is open to questioning; that which can be denied, challenged, or disputed.

As an adjective controvertible is

open to questioning; that which can be denied, challenged, or disputed.

Doubtful is a related term of controvertible.

As adjectives the difference between doubtful and controvertible

is that doubtful is subject to, or causing doubt while controvertible is open to questioning; that which can be denied, challenged, or disputed.

Uncertain is a related term of controvertible.

As adjectives the difference between uncertain and controvertible

is that uncertain is not certain; unsure while controvertible is open to questioning; that which can be denied, challenged, or disputed.

Dubious is a related term of controvertible.

As adjectives the difference between dubious and controvertible

is that dubious is arousing doubt; questionable; open to suspicion while controvertible is open to questioning; that which can be denied, challenged, or disputed.

Undecided is a related term of controvertible.

As adjectives the difference between undecided and controvertible

is that undecided is open and not yet settled or determined while controvertible is open to questioning; that which can be denied, challenged, or disputed.

As a noun undecided

is a voter etc who has not yet come to a decision.