Dubiosities refers to something that is uncertain, doubtful or questionable. The antonyms of dubiosities would be certainty, truth and confidence. These words represent the opposite meaning of dubiosities. Something that is certain or true is not questionable, dubious or uncertain. Certainty brings a sense of confidence and trust in something which is not present when dealing with dubiosities. Additionally, words like clarity, assurance, and conviction can also be synonyms of antonyms to dubiosities. These words provide a sense of clear understanding and trust, which is not available when we are dealing with dubiosities.