List of 426 Sets of Synonyms - How they Differ - Total of 2307 Words - 386

SYNONYMS: sure, certain, confident, positive.
These adjectives are compared as they mean feeling or showing no doubt.

Sure and certain . are frequently used interchangeably; sure, however, is the more subjective term, whereas certain may imply belief based on experience or evidence: Never teach a child anything of which you are not yourself sure. In this world nothing is certain but death and taxes
Confident suggests assurance founded on faith or reliance in oneself or in others: The senator is confident of re-election.
Positive suggests full, emphatic certainty: The prosecutor had positive proof of the defendant's guilt.