Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun disbelief

2 senses of disbelief

Sense 1
incredulity, disbelief, skepticism, mental rejection -- (doubt about the truth of something)
       => doubt, uncertainty, incertitude, dubiety, doubtfulness, dubiousness -- (the state of being unsure of something)

Sense 2
unbelief, disbelief -- (a rejection of belief)
       => content, cognitive content, mental object -- (the sum or range of what has been perceived, discovered, or learned)