As nouns the difference between doubter and pessimist
is that doubter is one who doubts while pessimist is pessimist.
pessimist
English
Noun
(
en noun)
Someone who habitually expects the worst outcome; one who looks on the dark side of things.
Antonyms
* optimist
Related terms
* pessimism
* pessimistic
Hyponyms
* bear (in finance)