conviction vs strong belief

conviction and strong belief both are nouns.

Word	Noun	Adjective	Verb	Adverb
conviction	Yes	No	No	No
strong belief	Yes	No	No	No

As nouns, conviction and strong belief are synonyms defined as:

conviction and strong belief: an unshakable belief in something without need for proof or evidence

Other synonyms of conviction include article of faith.

conviction (noun)	strong belief (noun)
(criminal law) a final judgment of guilty in a criminal case and the punishment that is imposed	an unshakable belief in something without need for proof or evidence
an unshakable belief in something without need for proof or evidence