| basic term(expression, reason, importance, significance) |
| bottom line(expression, reason, importance, significance) |
| break point(expression, reason, importance, significance) |
| center piece(expression, reason, importance, significance) |
| central element(expression, reason, importance, significance) |
| chief criterion(expression, reason, importance, significance) |
| chief reason(expression, reason, importance, significance) |
| controlling factor(expression, reason, importance, significance) |
| core driver(expression, reason, importance, significance) |
| cornerstone(noun, element, foundation, keystone, kingpin) |
| critical factor(expression, reason, importance, significance) |
| crucial factor(expression, reason, importance, significance) |
| crucial moment(expression, reason, importance, significance) |
| crucial point(expression, reason, importance, significance) |
| crucial thing(expression, reason, importance, significance) |
| crunch point(expression, reason, importance, significance) |
| deciding factor(expression, reason, importance, significance) |
| decisive factor(expression, reason, importance, significance) |
| decisive point(expression, reason, importance, significance) |
| determinant factor(expression, reason, importance, significance) |