A person who believes in a god but does not practice their faith is commonly referred to as a "believer" or a "theist." This individual may identify as a "non-practicing" or "lapsed" member of their religious tradition. Their beliefs in a higher power or deity remain intact, but they do not actively engage in religious rituals or observances.
A person who believes that war is wrong is called a "pacifist".
A person who believes in science is often referred to as a scientist or a rationalist.
A tolerant person.
conceited
Gullible.
Someone who doesnt give up and believes the caption "everything is difficult before its easy" will get far in life without a doubt.
One who believes that everything is predistined -FATALIST
Well ! If some person believes that his/her dreams do come true, means he believes he/she has the ability to perceive events in the future is normally called Clairvoyant.
A person who believes in aliens is often referred to as an "alien enthusiast" or someone who is "believes in extraterrestrial life."
Christian, Jew, Jehova
The religion is Judaism. A person who follows Judaism is Jewish.
This is called an opinion.