liar

liar
li‧ar /ˈlaɪə $ -ər/ noun [countable]someone who deliberately says things which are not true:
    Are you calling me a liar?
     

COLLOCATIONS

■ adjectives
   ▪ a good liar (also an accomplished liar formal) (=someone who tells believable lies) He's an accomplished liar who lies as easily as other men breathe.
   ▪ a terrible/poor/rotten liar (=who does not tell believable lies) You're a rotten liar, Julia. What really happened?
   ▪ a big liar spoken (=someone who tells big lies) You're such a big liar!
   ▪ a habitual/chronic/inveterate liar formal (=who lies a lot) Drug users are often habitual liars trying to cover up their addiction.
   ▪ a congenital/pathological/compulsive liar formal (=who tells lies because it is part of their personality to do so) He called her a congenital liar who would say anything to stay out of trouble.
■ verbs
   ▪ call somebody a liar (=say that someone is lying) Are you calling my mother a liar?
   ▪ accuse somebody of being a liar He accused me of being a liar.