doubter

As nouns the difference between doubter and naysayer

is that doubter is one who doubts while naysayer is one who consistently denies, criticizes, or doubts; a detractor.

As nouns the difference between doubter and pessimist

is that doubter is one who doubts while pessimist is pessimist.

As nouns the difference between doubter and egotist

is that doubter is one who doubts while egotist is a person who talks excessively about his or her self.

As nouns the difference between sceptic and doubter

is that sceptic is someone who is undecided as to what is true and enquires after facts while doubter is one who doubts.

Unbeliever is a related term of doubter.

As nouns the difference between unbeliever and doubter

is that unbeliever is one who does not believe, particularly in a deity (used by believers to describe other people) while doubter is one who doubts.

As nouns the difference between questioner and doubter

is that questioner is a person who asks questions, or who conducts an official enquiry while doubter is one who doubts.

Doubter is a related term of infidel.

As nouns the difference between doubter and infidel

is that doubter is one who doubts while infidel is one who does not believe in a certain religion.

As nouns the difference between agnostic and doubter

is that agnostic is a person who holds to a form of agnosticism, especially uncertainty of the existence of a deity while doubter is one who doubts.

As an adjective agnostic

is of or relating to agnosticism or its adherents.

As a noun doubter

is one who doubts.

As an adjective doubtful is

subject to, or causing doubt.

As nouns the difference between doubter and doubler

is that doubter is one who doubts while doubler is one who doubles.