impossible

As an adjective impossible is

not possible; not able to be done or happen.

As a noun impossible is

an impossibility.

As adjectives the difference between realistic and impossible

is that realistic is expressed or represented as being accurate while impossible is not possible; not able to be done or happen.

As a noun impossible is

{{cx|obsolete|lang=en}} an impossibility.

Impossible is a synonym of unsolvable.

As adjectives the difference between impossible and unsolvable

is that impossible is not possible; not able to be done or happen while unsolvable is not solvable.

As a noun impossible

is an impossibility.

Impossible is a synonym of insoluble.

As adjectives the difference between impossible and insoluble

is that impossible is not possible; not able to be done or happen while insoluble is that cannot be dissolved.

As a noun impossible

is an impossibility.

Impossible is a synonym of unyielding.

As adjectives the difference between impossible and unyielding

is that impossible is not possible; not able to be done or happen while unyielding is not giving in; not bending; stubborn.

As a noun impossible

is an impossibility.

As adjectives the difference between dynamic and impossible

is that dynamic is changing; active; in motion while impossible is not possible; not able to be done or happen.

As nouns the difference between dynamic and impossible

is that dynamic is a characteristic or manner of an interaction; a behavior while impossible is an impossibility.

Impossible is a synonym of intolerable.

As adjectives the difference between impossible and intolerable

is that impossible is not possible; not able to be done or happen while intolerable is intolerable.

As a noun impossible

is an impossibility.

As adjectives the difference between challenging and impossible

is that challenging is difficult, hard to do while impossible is not possible; not able to be done or happen.

As nouns the difference between challenging and impossible

is that challenging is the act of making a challenge while impossible is an impossibility.

As a verb challenging

is .

Impossible is a synonym of unbearable.

As adjectives the difference between impossible and unbearable

is that impossible is not possible; not able to be done or happen while unbearable is so unpleasant or painful as to be unendurable.

As a noun impossible

is an impossibility.

Impossible is a synonym of stubborn.

As adjectives the difference between impossible and stubborn

is that impossible is not possible; not able to be done or happen while stubborn is refusing to move or to change one's opinion; obstinate; firmly resisting.

As a noun impossible

is an impossibility.