knavish

As a noun deception

is disappointment.

As an adjective knavish is

having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

Knavish is a related term of counterfeit.

As adjectives the difference between knavish and counterfeit

is that knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent while counterfeit is false, especially of money; intended to deceive or carry appearance of being genuine.

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.

Treacherous is a related term of knavish.

As adjectives the difference between treacherous and knavish

is that treacherous is exhibiting treachery while knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

As an adjective knavish is

having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

Knavish is a related term of false.

As adjectives the difference between knavish and false

is that knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent while false is (label) one of two states of a boolean variable; logic.

Knavish is a related term of cheating.

As adjectives the difference between knavish and cheating

is that knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent while cheating is unsporting or underhand.

As a verb cheating is

.

As a noun cheating is

an act of deception, fraud, trickery, imposture, or imposition.

Crafty is a related term of knavish.

As adjectives the difference between crafty and knavish

is that crafty is relating to, or characterized by, craft or skill; dexterous while knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

Knavish is a related term of sham.

As an adjective knavish

is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

As a proper noun sham is

syria.

Underhand is a related term of knavish.

As adjectives the difference between underhand and knavish

is that underhand is secret; clandestine while knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.

As an adverb underhand

is with an underhand movement.

As adjectives the difference between unprincipled and knavish

is that unprincipled is lacking moral values while knavish is having the characteristics of a knave; mischievous, roguish, waggish, rascally or impertinent.