| causal factor(noun, expression, idiom) |
| causation(noun, cause, reason, base, element) |
| clincher |
| consideration(noun, feature, cause, influence, point) |
| discriminator(noun, technology, difference, selection, comparison) |
| drive(noun, cause, reason, object, spur) |
| ground(noun, cause, reason, matter, spur) |
| inducement(noun, cause, reason, object, base) |
| mainspring(noun, cause, reason, object, base) |
| principle(noun, cause, reason, base, matter) |
| provocation(noun, cause, reason, spur, lure) |
| start(cause, source, foundation, basis, derivation) |
| starting point(expression, cause, source, foundation, basis) |
| target date |
| argument(noun, cause, reason, base, call) |
| base(cause, reason, source, basis, justification) |
| absolute(definite, precise, sure, decisive, final) |
| account(noun, cause, reason, base, call) |
| action(noun, cause) |
| agent(noun, feature, cause, influence, point) |