fraudulent

As adjectives the difference between unlawful and fraudulent

is that unlawful is prohibited; not permitted by law (either civil or criminal law; see illegal) while fraudulent is dishonest; based on fraud or deception.

Fraudulent is a synonym of underhand.

As adjectives the difference between fraudulent and underhand

is that fraudulent is dishonest; based on fraud or deception while underhand is secret; clandestine.

As an adverb underhand is

with an underhand movement.

Fraudulent is a related term of unethical.

As adjectives the difference between fraudulent and unethical

is that fraudulent is dishonest; based on fraud or deception while unethical is not morally approvable; morally bad; not ethical.

Crooked is a synonym of fraudulent.

As adjectives the difference between crooked and fraudulent

is that crooked is not straight; having one or more bends or angles while fraudulent is dishonest; based on fraud or deception.

As a verb crooked

is (crook).

As adjectives the difference between fraudulent and sham

is that fraudulent is dishonest; based on fraud or deception while sham is intended to deceive; false.

As a noun sham is

a fake; an imitation that purports to be genuine.

As a verb sham is

to deceive, cheat, lie.

As an adjective fraudulent is

dishonest; based on fraud or deception.

Fraudulent is a synonym of guileful.

As adjectives the difference between fraudulent and guileful

is that fraudulent is dishonest; based on fraud or deception while guileful is full of guile; treacherously deceptive.

As adjectives the difference between fraudulent and spurious

is that fraudulent is dishonest; based on fraud or deception while spurious is false, not authentic, not genuine.

As an adjective fraudulent

is dishonest; based on fraud or deception.

As a noun certificate is

a document containing a certified statement.

As a verb certificate is

to supply with a certificate, especially following certification.