Synonyms of the word

untruthful

• adj. Not giving the truth; providing untrue facts; lying.
• adj. Pertaining to falsehood; corrupt; dishonest.

dishonest

• adj. Not honest.
• adj. Interfering with honesty.
• adj. (obsolete) Dishonourable; shameful; indecent; unchaste; lewd.
• adj. (obsolete) Dishonoured; disgraced; disfigured.

lying

• v. present participle of lie (“to rest in a horizontal position”).
• n. The act of one who lies, or keeps low to the ground.
• v. present participle of lie (“to intentionally give false information”).
• n. An act of telling a lie or falsehood.

mendacious

• adj. (of a person) Lying, untruthful or dishonest.
• adj. (of a statement, etc) False or untrue.