| critical juncture |
| critical mass(noun, expression, point, climax, crisis) |
| critical moment(noun, expression, climax, crisis, crunch) |
| crucial component(expression, reason, importance, significance) |
| crunch(noun, climax, crisis, watershed, crossroads) |
| deadline |
| decisive factor(expression, reason, importance, significance) |
| determinant factor(expression, reason, importance, significance) |
| do or die time(noun, expression, idiom, climax, crisis) |
| dominant cause(expression, reason, importance, significance) |
| dominant factor(expression, reason, importance, significance) |
| driving factor(expression, reason, importance, significance) |
| eleventh hour |
| first principle(expression, reason, importance, significance) |
| fundamental cause(expression, reason, importance, significance) |
| fundamental premise(expression, reason, importance, significance) |
| fundamental principle(expression, reason, importance, significance) |
| fundamental reason(expression, reason, importance, significance) |
| fundamental term(expression, reason, importance, significance) |
| initial cause(expression, reason, importance, significance) |