Fabulist and Maligner

Fabulist noun - A person who tells lies.

Maligner and fabulist are semantically related In some cases you can use "Maligner" instead a noun "Fabulist".

Maligner noun - One who attacks the reputation of another by slander or libel.

Fabulist and maligner are semantically related in liar topic. Sometimes you can use "Fabulist" instead a noun "Maligner", if it concerns topics such as person who tells falsehood.