| nucleus(noun, support, action, base, importance) |
| ogive |
| ordinance(noun, law, regulation, order, test) |
| pillar(essential, foundation, kingpin, fulcrum) |
| pith |
| pivot |
| point |
| postulate(noun, support, action, base, beginning) |
| precedent(noun, law, regulation, order, test) |
| premise(noun, support, action, base, beginning) |
| prescription(noun, law, regulation, order, test) |
| presumption(noun, support, action, base, beginning) |
| presupposition(noun, support, action, base, beginning) |
| primum mobile(expression, idiom, motive) |
| principal element(noun, expression, support, action, base) |
| proof(noun, support, action, base, beginning) |
| propriety(noun, law, regulation, order, test) |
| real issue |
| reason(noun, support, action, base, beginning) |
| regimen(noun, law, regulation, order, test) |