1. (noun) something that is certain

• foregone conclusion
• sure thing

1. (noun) the state of being certain

• assurance
• authority
• confidence
• self-assurance
• self-confidence
• sureness
• certitude
• cocksureness
• overconfidence
• reliance
• trust

2. (noun) something that is certain

• cert
• indisputability
• indubitability
• unquestionability
• unquestionableness
• ineluctability
• unavoidability
• inevitability
• inevitableness
• moral certainty
• predictability
• slam dunk
• surety

1. (noun) the state of being certain

• cognitive state
• state of mind

2. (noun) something that is certain

• quality

1. (noun) the state of being certain

• doubt
• doubtfulness
• dubiety
• dubiousness
• incertitude
• uncertainty

2. (noun) something that is certain

• precariousness
• uncertainness
• uncertainty