questionable

Unlikely is a related term of questionable.

As adjectives the difference between unlikely and questionable

is that unlikely is not likely; improbable; not to be reasonably expected while questionable is (obsolete) inviting questions; inviting inquiry.

As an adverb unlikely

is in an improbable manner.

As a noun unlikely

is something or somebody considered unlikely.

Unsettled is a related term of questionable.

As adjectives the difference between unsettled and questionable

is that unsettled is disturbed, upset while questionable is (obsolete) inviting questions; inviting inquiry.

As a verb unsettled

is (unsettle).

As adjectives the difference between possible and questionable

is that possible is able but not certain to happen; neither inevitable nor impossible while questionable is inviting questions; inviting inquiry.

As a noun possible

is a possible one.

Difficult is a related term of questionable.

As adjectives the difference between difficult and questionable

is that difficult is hard, not easy, requiring much effort while questionable is (obsolete) inviting questions; inviting inquiry.

As a verb difficult

is (obsolete|transitive) to make difficult; to impede; to perplex.

Assumed is a related term of questionable.

As adjectives the difference between assumed and questionable

is that assumed is used in a manner intended to deceive; fictitious while questionable is (obsolete) inviting questions; inviting inquiry.

As a verb assumed

is (assume).

Imaginary is a related term of questionable.

As adjectives the difference between imaginary and questionable

is that imaginary is existing only in the imagination while questionable is (obsolete) inviting questions; inviting inquiry.

As a noun imaginary

is imagination; fancy.

Questionable is a related term of controvertible.

As adjectives the difference between questionable and controvertible

is that questionable is (obsolete) inviting questions; inviting inquiry while controvertible is open to questioning; that which can be denied, challenged, or disputed.

Suspect is a related term of questionable.

In obsolete|lang=en terms the difference between suspect and questionable

is that suspect is (obsolete) to look up to; to respect while questionable is (obsolete) inviting questions; inviting inquiry.

As adjectives the difference between suspect and questionable

is that suspect is viewed with suspicion; suspected while questionable is (obsolete) inviting questions; inviting inquiry.

As a verb suspect

is to imagine or suppose (something) to be true, or to exist, without proof.

As a noun suspect

is a person who is suspected of something, in particular of committing a crime.

As adjectives the difference between questionable and disputable

is that questionable is (obsolete) inviting questions; inviting inquiry while disputable is of opinions, propositions or questions, subject to dispute; not settled.