untrue

As a verb discredited

is (discredit).

As an adjective untrue is

.

As adjectives the difference between untrue and unrealistic

is that untrue is while unrealistic is not realistic.

As adjectives the difference between nontrue and untrue

is that nontrue is (chiefly|logic) not true while untrue is .

Counterfeit is a related term of untrue.

As adjectives the difference between counterfeit and untrue

is that counterfeit is false, especially of money; intended to deceive or carry appearance of being genuine while untrue is .

As a noun counterfeit

is a non-genuine article; a fake.

As a verb counterfeit

is to falsely produce what appears to be official or valid; to produce a forged copy of.

As adjectives the difference between untrue and untrust

is that untrue is while untrust is (lb) faithless; distrustful.

As a noun untrust is

lack or absence of trust; mistrust; distrust.

Untrue is a related term of inconstant.

As adjectives the difference between untrue and inconstant

is that untrue is while inconstant is not constant; wavering.

Disobedient is a related term of untrue.

As adjectives the difference between disobedient and untrue

is that disobedient is not obedient while untrue is .

As an adjective untrue

is .

As an adverb untruthfully is

in an untruthful manner; falsely.

Untrue is a related term of deceptive.

As adjectives the difference between untrue and deceptive

is that untrue is while deceptive is .

Untrue is a related term of disaffected.

As adjectives the difference between untrue and disaffected

is that untrue is while disaffected is alienated or estranged, often with hostile effect; rebellious, resentful; disloyal.

As a verb disaffected is

(disaffect).